John T. Stewart Jr., 66, president of the Stewart Funeral Home, founded in 1900 by his late father and one of the oldest and largest black-owned funeral businesses in Washington, died Sunday at George Washington University Hospital following a stroke.

Mr. Stewart had managed the business for 28 years after his father's death in 1941. In 1969, he fell and subsequently was confined to a wheelchair. At that time his wife, Margaret, and his older son, John T. III, joined him in running the business. His younger son, Carlin O., later joined the business.

A native Washingtonian, Mr. Stewart attended D.C. public schools, Storer College at Harpers Ferry, W. Va., and Howard University.

Despite his illness, he remained active as a sportsman, deep sea fisherman and world traveler. He also continued his civic and community involvement as a member of the D.C. Chamber of Commerce, as a board member and officer of local banking and investment companies, and as a life member of the NAACP. He received many awards and citations for his civic contributions.

Mr. Stewart was treasurer of the Independent Funeral Directors Association for 15 years and was a member of the D.C. Board of Funeral Directors and Embalmers.

He was a 33rd-degree Mason and a member of Columbia Lodge No. 85. He also was a member of the Odd Fellows Association and the Pigskin Club.

In addition to his wife, of Washington, and sons, John T. III, of Temple Hills, and Carlin O., of Washington, survivors include a sister, Beulah S. Hill of Washington, and four grandchildren.