Warwick Rex Furr, 80, a partner in the old Furr Brothers Poultry business in Washington and a long-time area resident, died Saturday in a hospital in Avon Park, Fla. He had congestive heart failure.

Mr. Furr and his brother, Thurston, owend and operated Furr Brothers Poultry, a wholesale poultry supply firm on Maine Avenue, from the early 1940s until Thurston Furr's death in 1960. Warwick Furr closed the business a year later. Before the founding of Furr Brothers, Mr. Furr had worked for several wholesale food establishments along Maine Avenue.

He was born at Waterford, in Loudoun County, Va., and was reared in the Clarendon section of Arlington, where he lived until retiring to, Avon Park, Fla., in 1961. Mr. Furr. had been a member of the Clarendon Volunteer Fire Department in the 1920s and 1930s. He was a member of the Arlington Presbyterian Church.

Survivors include his wife, Shirley, of Avon Park; three sons, Charles, of Vienna, Bud, of Haymarket and Michael, of Lakeland, Fla.; two daughters, Joan Harrell of Orlando, Fla., and Pat Landress of Avon Park, and 11 grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the National Wildlife Federation, or to the National Audubon Society.