Betty J. Douglas, 82, who was the Capitol Hill representative of the national League of Women Voters in the 1950s and 1960s, died Sunday at St. Luke's Hospital in St. Louis, Mo. She had a stroke on Friday.

Mrs. Douglas, who was born in Springfield, Mo., was an active member of League chapters in St. Louis, where she lived for many years, and in Washington, where she moved with her family in 1945.

In 1952, she was employed by the League's national office as congressional director. In that job she made the organization's views known to legislators on issues ranging from individual liberties during the McCarthy era to Lyndon Johnson's war on poverty. She retired in 1965, but continued to contribute to League projects for the rest of the decade.

Born Sarah Elizabeth Johnson, she graduated from the University of Missouri School of Journalism in Columbia, Mo. She then got a job as a reporter on the St. Louis Globe Democrat. In 1926, she married Francis P. Douglas, the Globe Democrat's city editor.

The family moved to Washington when Mr. Douglas was hired as a reporter by The Washington Evening Star. Mr. Douglas died in 1968. In 1974, Mrs. Douglas moved to Clayton, Mo., a St. Louis suburb.

Survivors include a daughter, Mrs. William P. Outten of Clayton, a son, Walter Douglas of Washington; a brother, Richard S. Johnson of Springfield, Mo.; two half-sisters, Helen A. Johnson and Mrs. Burton I. Haseltine, both of Springfield, and two grandchildren.