W. Ledru Koontz, 80, a former president of the Anacostia National Bank and the Hartman Realty Co., died July 1 at the Southern Maryland Medical Center in Clinton after a stroke.

Mr. Koontz, who lived in Clinton, was born in Washington and attended Eastern High School. He went to work for the Anacostia National Bank as a runner at the age of 15. In 1943, he was named president of the bank.

In 1952, he resigned to become president of the Hartman Realty Co., a position he held until the early 1970s. He remained associated with the firm until his retirement about 1978.

Mr. Koontz was the first president of the board of trustees of the Cafritz Hospital, now the Greater Southeast Community Hospital. He was a member of the board of the Southeast Washington Neighborhood House and the board of the Connecticut Avenue United Methodist Home. He was a charter member of the Anacostia Lions Club and a past master of Masonic Lodge No. 21.

He also was a member of the Anacostia United Methodist Church and helped establish the Shaw United Methodist Church.

Survivors include his wife, Helen Appel Koontz of Clinton; a daughter, Carolyn K. Arban of Philadelphia; a sister, Hilda E. Koontz of Annandale; two grandsons and a great-grandson.