Burton Kephart, 74, a land developer who had lived in Arlington since the 1930s and had been active in charitable and political organizations, died May 30 in Arlington Hospital. He had cancer.

He had been a partner in River Oaks Associates, a land development venture in Northern Virginia, since the early 1960s. Before that, he had been affiliated with the Arlington Motor Co., a Ford Dealership, for about 20 years and was vice president and general manager of the company when he retire in 1965.

In 1952, Mr. Kephart succeeded Joel T. Broyhill as president of the Arlington Republican Club and remained active in Republican politics in Arlington for many years.

He had served on the board of directors of the Salvation Army in Arlington for the last 15 years and was a former chairman of the Army's state advisory board.

Mr. Kephart was an elder and member of the board of Trinity Presbyterian Church in Arlington.

He was a charter member of the Optimist Club in Arlington and its president from 1962 to 1963. He was named that organization's "Man of the Year" in 1970 and 1980.

Mr. Kephart was a native of Taneytown, Md., and came here in the 1930s. He was a graduate of Southeastern University's law school.

His wife, the former Sadie Boswell, died in 1979. Mr. Kephart's survivors include a daughter, Jean Stick of York, Pa.; two sisters, Catherine K. Amos of Columbia, Ohio, and Dorothy Hines of Philadelphia; and two grandchildren.