The Mutual UFO Network is an American non-profit organization

Non-profit organization

Nonprofit organization is neither a legal nor technical definition but generally refers to an organization that uses surplus revenues to achieve its goals, rather than distributing them as profit or dividends...

 that investigates cases of reported UFO sightings. It is one of the oldest and largest UFO

Unidentified flying object

A term originally coined by the military, an unidentified flying object is an unusual apparent anomaly in the sky that is not readily identifiable to the observer as any known object...

-investigative organizations in the United States.

MUFON was originally established as the Midwest UFO Network in Quincy, Illinois

Quincy, Illinois

Quincy, known as Illinois' "Gem City," is a river city along the Mississippi River and the county seat of Adams County. As of the 2010 census the city held a population of 40,633. The city anchors its own micropolitan area and is the economic and regional hub of West-central Illinois, catering a...

 on May 30, 1969 by Walter H. Andrus, Allen Utke, John Schuessler, and others. Most of MUFON's early members had earlier been associated with Aerial Phenomena Research Organization

Aerial Phenomena Research Organization

The Aerial Phenomena Research Organization was a UFO research group started in 1952 by Jim and Coral Lorenzen.The group, which was based in Tucson, Arizona but had many state branches, remained active until 1988....

 (APRO).

The organization now has more than 3,000 members worldwide, with a majority of its membership base situated in the continental United States.