The 1991 USA Outdoor Track and Field Championships took place between June 13–15 at Downing Stadium on Randall's Island in New York City. This was the last USA Outdoor Track and Field Championships organized by The Athletics Congress. The following year's Olympic Trials served as the National Championships during the last year of TAC's existence. The competition acted as a way of selecting the United States team for the 1991 World Championships in Athletics in Tokyo, Japan August 23 to September 1 later that year.

Downing Stadium, previously known as Triborough Stadium and Randall's Island Stadium, was a 22,000-seat stadium in New York City. It was renamed Downing Stadium in 1955 after John J. Downing, a director at the New York City Department of Parks and Recreation. It was demolished in 2002 and the current Icahn Stadium was built on the site.