California

• De Turk Round Barn, Santa Rosa, CA, listed on the NRHP in California

Delaware

• Cherbourg Round Barn, Little Creek, DE, listed on the NRHP in Delaware

Georgia

• Dorough Round Barn and Farm, Hickory Level, GA, listed on the NRHP in Georgia

Illinois

• Wheeler-Magnus Round Barn
  Wheeler-Magnus Round Barn
  The Wheeler-Magnus Round Barn is located in the Cook County city of Arlington Heights in the U.S. state of Illinois. It was listed on the National Register of Historic Places in 1992 when it joined the Round Barns in Illinois Multiple Property Submission . It is the only round barn in Cook County...
  
  , Arlington Heights, IL, listed on the NRHP in Illinois
• Kleinkopf, Clarence, Round Barn, Colchester, IL, listed on the NRHP in Illinois
• Weber, Robert, Round Barn, Durand, IL, listed on the NRHP in Illinois
• Harbach, Gerald, Round Barn, Eleroy, IL, listed on the NRHP in Illinois
• Otte, Dennis, Round Barn, Eleroy, IL, listed on the NRHP in Illinois
• Bruce, James, Round Barn, Freeport, IL, listed on the NRHP in Illinois
• Ryan Round Barn
  Ryan Round Barn
  The Ryan Round Barn was the first round barn in the U.S. state of Illinois listed on the National Register of Historic Places, it joined that list on New Year's Eve 1974. Though it is, indeed, a round barn, the Ryan Round Barn is not part of the round barns Multiple Property Submission for Illinois...
  
  , Kewanee, IL, listed on the NRHP in Illinois
• Jensen, Chris, Round Barn, Lena, IL, listed on the NRHP in Illinois
• Lewis Round Barn
  Lewis Round Barn
  The Lewis Round Barn is located in Mendon, Illinois, in northwestern Adams County. It is one of 14 round barns recognized by the Illinois Historic Preservation Agency. The barn was listed on the National Register of Historic Places on Jan. 29, 2003....
  
  , Mendon, IL, listed on the NRHP in Illinois
• Fehr, Charles, Round Barn, Orangeville, IL, listed on the NRHP in Illinois
• Schultz, Raymond, Round Barn, Pontiac, IL, listed on the NRHP in Illinois
• George, Ron, Round Barn, Romeoville, IL, listed on the NRHP in Illinois
• Tillery, Virginia, Round Barn, Whitehall, IL, listed on the NRHP in Illinois

Indiana

• Utter--Gerig Round Barn, Akron, IN, listed on the NRHP in Indiana
• Senour, Frank, Round Barn, Blackhawk, IN, listed on the NRHP in Indiana
• Ranck, Thomas, Round Barn, Brownsville, IN, listed on the NRHP in Indiana
• Pleak, Strauther, Round Barn, Greensburg, IN, listed on the NRHP in Indiana
• VanHuys, Andrew B., Round Barn, Lebanon, IN, listed on the NRHP in Indiana
• York, W. H., Round Barn, Lodi, IN, listed on the NRHP in Indiana
• Littleton, Frank, Round Barn, Mount Comfort, IN, listed on the NRHP in Indiana
• Griffin, Cornish, Round Barn, Pleasant Lake, IN, listed on the NRHP in Indiana
• Rankin, Rebecca, Round Barn, Poling, IN, listed on the NRHP in Indiana
• Haimbaugh, John, Round Barn, Rochester, IN, listed on the NRHP in Indiana
• Leedy, Bert, Round Barn, Rochester, IN, listed on the NRHP in Indiana

Iowa

• Nelson Round Barn
  Nelson Round Barn
  The Nelson Round Barn is an historical structure located near Allerton in rural Wayne County, Iowa. It was built in 1912 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 50 feet around. It features white vertical siding,...
  
  , Allerton, IA, listed on the NRHP in Iowa
• Darrow, George, Round Barn
  George Darrow Round Barn
  The George Darrow Round Barn is located near Alta Vista in rural Chickasaw County, Iowa. It was built in 1916 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 64 feet around. The barn is constructed of clay tile and...
  
  , Alta Vista, IA, listed on the NRHP in Iowa
• Thomsen Round Barn
  Thomsen Round Barn
  The Thomsen Round Barn is an historical structure located near Armstrong in rural Emmet County, Iowa. It was built in 1912 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 65 feet around. The first floor is constructed...
  
  , Armstrong, IA, listed on the NRHP in Iowa
• Lenox Round Barn
  Lenox Round Barn
  The Lenox Round Barn is an historical structure that is part of the Taylor County Historical Museum in Bedford, Iowa. It was built in 1905 and has been listed on the National Register of Historic Places since 1999. The building measures 70x50 feet . It features white vertical siding, a large...
  
  , Bedford, IA, listed on the NRHP in Iowa
• Oakland, William, Round Barn
  William Oakland Round Barn
  The William Oakland Round Barn is an historic structure located near Blairsburg in rural Hamilton County, Iowa, United States. It was built in 1910 and has been listed on the National Register of Historic Places since 1986. The true round barn measures 50 feet around...
  
  , Blairsburg, IA, listed on the NRHP in Iowa
• Nebergall "Knoll Crest" Round Barn
  Nebergall "Knoll Crest" Round Barn
  The Nebergall "Knoll Crest" Round Barn is located between Davenport and Blue Grass in rural Scott County, Iowa. It was built in 1914 and has been listed on the National Register of Historic Places since 1986.-Architecture:...
  
  , Blue Grass, IA, listed on the NRHP in Iowa
• Round Barn, Buckingham Township
  Round Barn, Buckingham Township
  The Round Barn, Buckingham Township is an historic structure located north of Traer in Tama County, Iowa, United States. It was built in 1920 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 50 feet around. The...
  
  , Buckingham, IA, listed on the NRHP in Iowa
• Wickfield Round Barn
  Wickfield Round Barn
  The Wickfield Round Barn is a historic structure located near Cantril in rural Van Buren County, Iowa, United States. It was built in 1919 and has been listed on the National Register of Historic Places since 1986. The building measures 52 x 65 feet around. The structure is constructed of...
  
  , Cantril, IA, listed on the NRHP in Iowa
• Rownd, C. A., Round Barn
  C.A. Rownd Round Barn
  The C.A. Rownd Round Barn is an historic structure located south of Cedar Falls, Iowa in Black Hawk County. It was built in 1911 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 83 feet around.-References:...
  
  , Cedar Falls, IA, listed on the NRHP in Iowa
• Plagmann Round Barn
  Plagmann Round Barn
  The Plagmann Round Barn is an historical structure located near Conroy in rural Iowa County, Iowa. It was built in 1912 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 100 feet around...
  
  , Conroy, IA, listed on the NRHP in Iowa
• Spotts Round Barn
  Spotts Round Barn
  The Spotts Round Barn is an historical structure located near Charles City in rural Floyd County, Iowa. It was built in 1914 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 55 feet around...
  
  , Charles City, IA, listed on the NRHP in Iowa
• Waveland Round Barn
  Waveland Round Barn
  The Waveland Round Barn is an historical structure located near Cushing, Iowa in rural Ida County, Iowa. It was built in 1900 and has been listed on the National Register of Historic Places since 1986. The building measures 50 feet around...
  
  , Cushing, IA, listed on the NRHP in Iowa
• Brooks Round Barn
  Brooks Round Barn
  The Brooks Round Barn was an historical structure located near Nashua in rural Floyd County, Iowa. It was built in 1914 and has been listed on the National Register of Historic Places since 1986. The building was a true round barn that measured 60 feet around. It was constructed of clay tile...
  
  , Charles City, IA, listed on the NRHP in Iowa
• Kirkpatrick, Robert Round Barn
  Robert Kirkpatrick Round Barn
  The Robert Kirkpatrick Round Barn is located near Coggon in rural Delaware County, Iowa. It was built in 1919 and has been listed on the National Register of Historic Places since 2005. The building is a true round barn that measures 60 feet around...
  
  , Coggon, IA, listed on the NRHP in Iowa
• Reynolds, Charles B., Round Barn
  Charles B. Reynolds Round Barn
  The Charles B. Reynolds Round Barn is an historical structure located near Doon in rural Lyon County, Iowa. It was built in 1924 and has been listed on the National Register of Historic Places since 1999. The building is a true round barn and features white horizontal siding, a two-pitch...
  
  , Doon, IA, listed on the NRHP in Iowa
• Round Barn, Dubuque Township
  Round Barn, Dubuque Township
  The Round Barn, Dubuque Township is an historic structure located in Dubuque Township in Dubuque County, Iowa. It was built in 1915 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 60 feet around...
  
  , Dubuque, IA, listed on the NRHP in Iowa
• Round Barn, Bruce Township Section 3
  Round Barn, Bruce Township Section 3
  The Round Barn, Bruce Township Section 3 is located in Bruce Township, Benton County, Iowa. It was built in 1910 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 60 feet around. The barn is constructed of clay tile and...
  
  , Eagle Center, IA, listed on the NRHP in Iowa
• McQuilkin, James Greer, Round Barn
  James Greer McQuilkin Round Barn
  The James Greer McQuilkin Round Barn is located near Eagle Center in rural Benton County, Iowa. It was built in 1918 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 60 feet around. The barn is constructed of clay tile...
  
  , Eagle Center, IA, listed on the NRHP in Iowa
• Frantz Round Barn
  Frantz Round Barn
  The Frantz Round Barn was located near Grand Junction in rural Greene County, Iowa. It was built in 1911 and has been listed on the National Register of Historic Places since 1986. The building was a true round barn that measured 55 feet around. The barn was constructed in concrete block and...
  
  , Grand Junction, IA, listed on the NRHP in Iowa
• McKenzie, Erza, Round Barn
  Erza McKenzie Round Barn
  The Erza McKenzie Round Barn is located near Hazleton in rural Buchanan County, Iowa. It was built in 1922 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 70 feet around. The barn is constructed of clay tile and...
  
  , Hazleton, IA, listed on the NRHP in Iowa
• Octagon Round Barn, Indian Creek Township
  Octagon Round Barn, Indian Creek Township
  The Octagon Round Barn, Indian Creek Township is an historic structure located near Nevada in rural Story County, Iowa, United States. It was built in 1880 and has been listed on the National Register of Historic Places since 1986. The true round measures 50 feet around. It is constructed of...
  
  , Iowa Center, IA, listed on the NRHP in Iowa
• Wood, Herman, Round Barn
  Herman Wood Round Barn
  The Herman Wood Round Barn is located near Iowa Falls in rural Franklin County, Iowa. It was built in 1916 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 122 feet around...
  
  , Iowa Falls, IA, listed on the NRHP in Iowa
• Slayton Farms-Round Barn
  Slayton Farms-Round Barn
  The Slayton Farms-Round Barn is an historic structure located near Iowa Falls in rural Hardin County, Iowa, United States. It was built in 1915 and has been listed on the National Register of Historic Places since 1986. The barn is one of 16 that was built by the Johnston Brothers Clay Works...
  
  , Iowa Falls, IA, listed on the NRHP in Iowa
• Round Barn, Washington Township
  Round Barn, Washington Township (Janesville, Iowa)
  The Round Barn, Washington Township is an historic structure located north of Cedar Falls, Iowa in Black Hawk County. It was built in 1917 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 60 feet around...
  
  , Janesville, IA, listed on the NRHP in Iowa
• Round Barn, Bruce Township Section 6
  Round Barn, Bruce Township Section 6
  The Round Barn, Bruce Township Section 6 is located in Bruce Township, Benton County, Iowa. It was built in 1914 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 60 feet around. The barn is constructed of clay tile and...
  
  , La Porte, IA, listed on the NRHP in Iowa
• Tonsfeldt Round Barn
  Tonsfeldt Round Barn
  The Tonsfeldt Round Barn is located on the Plymouth County Fairgrounds in LeMars, Iowa. It was built in 1918 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 82x68 feet . The barn features white horizontal siding, an...
  
  , Le Mars, IA, listed on the NRHP in Iowa
• Meier, Fred W., Round Barn
  Fred W. Meier Round Barn
  The Fred W. Meier Round Barn was an historic structure located near Ludlow in rural Allamakee County, Iowa. It was built in 1912 and has been listed on the National Register of Historic Places since 1986. The building was a true round barn that measures 56 feet around...
  
  , Ludlow, IA, listed on the NRHP in Iowa
• Round Barn, Cooper Township
  Round Barn, Cooper Township
  The Round Barn, Cooper Township is located in Cooper Township near Mapleton in rural Monona County, Iowa. It was built in 1921 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 38 feet around. The barn features white...
  
  , Mapleton, IA, listed on the NRHP in Iowa
• Round Barn, Millville Township
  Round Barn, Millville Township
  The Round Barn, Millville Township is an historical structure located in rural Clayton County, Iowa, United States. It was built in 1916 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that is covered in metal vertical siding and...
  
  , Millville, IA, listed on the NRHP in Iowa
• Holtkamp Round Barn
  Holtkamp Round Barn
  The Holtkamp Round Barn is an historical structure located near Salem in rural Henry County, Iowa. It was built in 1918 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 50 feet around. It is constructed of clay tile and...
  
  , Salem, IA, listed on the NRHP in Iowa
• Round Barn, Norway Township
  Round Barn, Norway Township
  The Round Barn, Norway Township is an historical round barn located in rural Winnebago County, Iowa. It was built in 1920 and has been listed on the National Register of Historic Places since 1987....
  
  , Scarville, IA, listed on the NRHP in Iowa
• Round Barn, Washington Township
  Round Barn, Washington Township (Sciola, Iowa)
  The Round Barn, Washington Township is located near Sciola in rural Montgomery County, Iowa. It was built in 1917 and has been listed on the National Register of Historic Places since 1986. The building is a 24-sided structure that measures 60 feet around. The barn features red vertical...
  
  , Sciola, IA, listed on the NRHP in Iowa
• Round Barn, Pilot Grove Township
  Round Barn, Pilot Grove Township
  The Round Barn, Pilot Grove Township is an historical structure located in rural Montgomery County, Iowa, United States. It was built in 1912 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 60 feet around...
  
  , Sennett, IA, listed on the NRHP in Iowa
• Miller Round Barn
  Miller Round Barn
  The Miller Round Barn is an historical structure located near Sharon Center in rural Johnson County, Iowa, United States. It was built in 1918 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 60 feet around...
  
  , Sharon Center, IA, listed on the NRHP in Iowa
• Eckle Round Barn
  Eckle Round Barn
  The Eckle Round Barn was located near Shelby in rural Pottawattamie County, Iowa. It was built in 1928 and has been listed on the National Register of Historic Places since 1986. The building was a true round barn that measured 54 feet around. The barn featured white horizontal siding, a...
  
  , Shelby, IA, listed on the NRHP in Iowa
• Dobbin Round Barn
  Dobbin Round Barn
  The Dobbin Round Barn is located near State Center in rural Marshall County, Iowa. It was built in 1919 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 65 feet around. The barn features white vertical siding, a...
  
  , State Center, IA, listed on the NRHP in Iowa
• Young, John W., Round Barn
  John W. Young Round Barn
  The John W. Young Round Barn is an historic structure located near Traer in rural Tama County, Iowa, United States. It was built in 1917 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 65 feet around...
  
  , Traer, IA, listed on the NRHP in Iowa
• Clark Round Barn
  Clark Round Barn
  The Clark Round Barn was an historical structure located near Tyrone in rural Monroe County, Iowa, United States. It was built in 1908 and has been listed on the National Register of Historic Places since 1986. The building was a round barn that measured 48 x 30 feet around. It featured a...
  
  , Tyrone, IA, listed on the NRHP in Iowa

Kansas

• Thompson-Wohlschlegel Round Barn, Harper, KS, listed on the NRHP in Kansas
• Fromme-Birney Round Barn, Mullinville, KS, listed on the NRHP in Kansas

Minnesota

• Dammon Round Barn
  Dammon Round Barn
  Dammon Round Barn is a round barn just southeast of Red Wing, Minnesota and adjacent to U.S. Route 61. The barn is listed on the National Register of Historic Places. It was built in 1914, with a foundation of Mississippi River limestone, and is in diameter and high...
  
  , Red Wing, MN, listed on the NRHP in Minnesota
• Cota Round Barns, St. Cloud, MN, listed on the NRHP in Minnesota

Montana

• Kent Dairy Round Barn, Red Lodge, MT, listed on the NRHP in Montana

Nebraska

• Starke Round Barn, Red Cloud, NE, listed on the NRHP in Nebraska
• Ehlers Round Barn, Roca, NE, listed on the NRHP in Nebraska

New Mexico

• Ojo Caliente Hot Springs Round Barn, Ojo Caliente, NM, listed on the NRHP in New Mexico

New York

• Bates Round Barn
  Bates Round Barn
  Bates Round Barn is a historic round barn at Greene in Chenango County, New York. It was built in 1928 and is a three story structure, with attic, and a diameter of 60 feet. It is covered by a domical roof and the interior silo, built of tile, is topped by a ventilator...
  
  , Greene, NY, listed on the NRHP in New York
• Young Round Barn
  Young Round Barn
  Young Round Barn is a historic round barn at Greene in Chenango County, New York. It was built in 1914 and is a two story structure, with a large square entrance bay, and a diameter of 80 feet. It is covered by a conical, two slope gambrel roof topped with a circular cupola venting the loft and...
  
  , Greene, NY, listed on the NRHP in New York
• Kelly Round Barn
  Kelly Round Barn
  Kelly Round Barn is a historic round barn located near Halcottsville in Delaware County, New York, United States. It was built about 1893 and is a two story structure with a low conical roof, approximately 90 feet in diameter. It features a central silo....
  
  , Halcottsville, NY, listed on the NRHP in New York

North Dakota

• Funseth, Carlott, Round Barn, Kempton, ND, listed on the NRHP in North Dakota
• Zoller-Frasier Round Barn
  Zoller-Frasier Round Barn
  Zoller-Frasier Round Barn is a historic round barn located at Newville in Herkimer County, New York. It was built about 1895 and is approximately 80 feet in diameter. It is constructed of clapboard sided stud walls above a low mortared stone foundation. It is built surrounding a self-supporting...
  
  , Newville, NY, listed on the NRHP in New York
• Robert Abell Round Barn, Burnstad, ND, listed on the NRHP in North Dakota
• Cote, Urbain, Round Barn, Dunseith, ND, listed on the NRHP in North Dakota
• Baker, Cecil, Round Barn, Kensal, ND, listed on the NRHP in North Dakota
• Myhre, Jens, Round Barn, New Rockford, ND, listed on the NRHP in North Dakota
• Glick, Levi, Round Barn, Surrey, ND, listed on the NRHP in North Dakota

Ohio

• Round Barn (Columbus Grove, Ohio), listed on the NRHP in Ohio
• Round Barn (Lima, Ohio), listed on the NRHP in Ohio
• Round Barn (New Hampshire, Ohio), listed on the NRHP in Ohio
• Round Barn (Paulding, Ohio), listed on the NRHP in Ohio
• Round Barn (Van Wert, Ohio), listed on the NRHP in Ohio

Oklahoma

• Arcadia Round Barn, Arcadia, OK, listed on the NRHP in Oklahoma
• Hines Round Barn, Sallisaw, OK, listed on the NRHP in Oklahoma

Oregon

• French, Pete, Round Barn, Burns, OR, listed on the NRHP in Oregon

Pennsylvania

• Neff Round Barn
  Neff Round Barn
  Neff Round Barn, also known as the Red Round Barn, is a historic round barn located at Potter Township, Centre County, Pennsylvania. It was built about 1910, and is a white pine structure on a limestone foundation. The interior has two floors: the cattle floor and the mow floor. It is 88 feet in...
  
  , Centre Hall, PA, listed on the NRHP in Pennsylvania

South Dakota

• Emminger, Corson, Round Barn, Watertown, SD, listed on the NRHP in South Dakota
• Freier Round Barn, Draper, SD, listed on the NRHP in South Dakota
• Shafer Round Barn, Sioux Falls, SD, listed on the NRHP in South Dakota
• Stark Round Barn, Unityville, SD, listed on the NRHP in South Dakota
• J. Whitney Goff Round Barn, Winfred, SD, listed on the NRHP in South Dakota

Washington

• Laughlin Round Barn, Castle Rock, WA, listed on the NRHP in Washington

West Virginia

• Hamilton Round Barn
  Hamilton Round Barn
  Hamilton Round Barn is a historic round barn located near Mannington, Marion County, West Virginia. It was built in 1911, and is circular in shape, measuring 66 feet in diameter and 75 feet high at the center. It features a gambrel roof topped by a six-sided cupola. The barn has horizontal...
  
  , Mannington, WV, listed on the NRHP in West Virginia

Wisconsin

• Dougan Round Barn, Beloit, WI, listed on the NRHP in Wisconsin
• George Apfel Round Barn, Clinton, WI, listed on the NRHP in Wisconsin
• Annala Round Barn, Hurley, WI, listed on the NRHP in Wisconsin
• Central Wisconsin State Fair Round Barn, Marshfield, WI, listed on the NRHP in Wisconsin
• Gempeler Round Barn, Orfordville, WI, listed on the NRHP in Wisconsin
• Risum Round Barn, Orfordville, WI, listed on the NRHP in Wisconsin