Henry Rau, 76, board chairman of Rau Radio Stations, Inc., and a resident of Alexandria's since 1950, died Friday at his winter home in Naples, Fla., after a stroke.

At the time of his death, Rau Radio owned 12 radio stations, including ones in North Carolina, Delaware, West Virginia, and Tennessee. The company also owned four stations in Maryland, WARK-AM and WWCS-FM, both in Hagerstown and WNAV-AM and WNAV-FM, both in Arlington.

Mr. Rau's company also had owned radio station WOL-AM in Washington from the early 1950s to the mid-1960s.

Mr. Rau was a native of New York City and a graduate of the Massachusetts Institute of Technology. He came to Washington during World War II. After moving to Alexandria, he had served as president of the board of Alexandria Hospital, and the Old Town Civic Association.

He was a past-chairman of the Mutual Affiliates Advisory Committee and had served as a director of First Virginia Bank.

Mr. Rau was a life-master of the American Contract Bridge League and a member of the Belle Haven Country Club.

Survivors include his wife, Marion, of Alexandria; two daughters, Robin Henry of New York City and Cynthia Boyer of Washington, and four grandchildren.

The family suggests that contributions of sympathy be in the form of contributions to the Alexandria Hospital School of Nursing.