The Chicago North Shore and Milwaukee Railroad, often called the North Shore Line, was an interurban

Interurban

An interurban, also called a radial railway in parts of Canada, is a type of electric passenger railroad; in short a hybrid between tram and train. Interurbans enjoyed widespread popularity in the first three decades of the twentieth century in North America. Until the early 1920s, most roads were...

 railroad line that operated between Chicago, Illinois, and Milwaukee, Wisconsin

Milwaukee, Wisconsin

Milwaukee is the largest city in the U.S. state of Wisconsin, the 28th most populous city in the United States and 39th most populous region in the United States. It is the county seat of Milwaukee County and is located on the southwestern shore of Lake Michigan. According to 2010 census data, the...

, until its abandonment in 1963.
The predecessor of the Chicago North Shore and Milwaukee was founded in 1891 as the Waukegan & North Shore Rapid Transit Company, a street railway line in Waukegan, Illinois

Waukegan, Illinois

Waukegan is a city and county seat of Lake County, Illinois. As of the 2000 census, the city had a total population of 87,901. The 2010 population was 89,078. It is the ninth-largest city in Illinois by population...

. As the company grew and made plans for expansion, it became the Chicago and Milwaukee Electric Railroad

Chicago and Milwaukee Electric Railroad

The Chicago and Milwaukee Electric Railroad was an electric interurban railroad that connected Evanston, Illinois and Milwaukee, Wisconsin. It was founded in the 1890s and was reorganized in 1916, becoming the Chicago North Shore and Milwaukee Railroad....

.

When the company exited reorganization in 1916, it was renamed to Chicago North Shore and Milwaukee Railroad.