Simon A. Douglas, 81, the owner and operator of the S.A. Douglas Realty Co. in Washington since 1965 and a former job placement counselor with the D.C. public schools for over 20 years, died Jan. 14 of a heart ailment at Howard University Hospital. He lived in Washington.

Mr. Douglas was born in Eolia, Mo. He moved to Washington in the 1920s. He was a 1928 graduate of Howard University and earned a master's degree in business administration at New York University.

During the mid-1930s, he was a business teacher at Cardozo High School. From the late 1930s until 1964, he was a job placement counselor with the D.C. schools.

From 1944 until 1959, Mr. Douglas worked as a real estate salesman with the John R. Pinkett realty company in Washington. In 1959, he and a partner established the Douglas and Shamwell Realty Co. here. He opened his present firm in 1965.

He belonged to the Washington Board of Realtors and the Prince George's County Board of Realtors.

Mr. Douglas founded and edited the old Upper Northeast News. He was a past treasurer of the D.C. Federation of Civic Associations, and a board member of the Metropolitan YMCA and the Industrial Bank of Washington. He also belonged to the Michigan Park Christian Church and the Woodridge Civic Association in Washington.

Survivors include his wife, Vivian Collier Douglas of Washington; two sisters, Evelyn Parsons of New Hartford, Mo., and Alta Mae Caldwell of Chicago, and two brothers, Bragg Douglas of Denver, and Robert Douglas of Eolia.