Dr. Edwin T. Sexton Jr., 60, a Washington consultant who was a former Republican Party and Commerce Department official and who had served in the Kansas state Senate from 1964 to 1965, died Sept. 16 at the Nashville, Tenn. airport following a heart attack.

He was on a business trip on a Republic Airlines flight between Washington and Kansas when he was stricken. The plane made an emergency stop in Nashville.

Dr. Sexton moved here in 1966 and joined the Republican National Committee later that year. Before leaving the committee in 1973, he had served as director of its black political division and as a deputy assistant to the committee chairman.

From 1973 to 1977, he was a deputy director of the Commerce Department's office of minority business. At the time of his death, he was president of Sexton and Associates, a Washington financial and management consulting firm. He had founded that concern in the 1970s.

He was a founder and board director of the National Coalition for Environmental and Social Change. He was a member of the Black Republican Council, the NAACP and the Urban League. He was holder of a half-dozen honorary doctorates.

Dr. Sexton, who lived in Silver Spring, was a native of Wichita, Kan. and an Army veteran. He attended the University of Wichita and earned a doctorate in public administration at the Daniel Hale Williams University in Chicago.

Before moving to Washington, he had founded, edited and published a weekly newspaper in Wichita for over 10 years, served as president of the National Federation of Young Republicans and worked for Rep. Garner E. Shriver (R-Kan.).

Survivors include his wife, Dorothy Hellen, of Silver Spring; two daughters, Telana D. Sexton-Hayles of Altadena, Calif. and Darcel Yvette Sexton-Patterson of Silver Spring; a brother, Linwood, of Wichita; and four grandchildren.