Wallace B. Davis, 91, a retired Washington restaurateur and rooming house owner, died Tuesday at The Washington House in Alexandria after a long illness.

He had lived there for the last three years after selling his rooming houses in the 1700 block of N Street NW. He had run a number of rooming and boarding homes for the young people for 33 years.

Mr. Davis also had operated Walnick's Restaurant on lower Connecticut Avenue on lower Connecticut Avenue for 25 years before selling it in 1970. He was a former member of the old Washington Board of Trade.

Born in Asheville, N.C., Mr. Davis had been one of the youngest bank presidents in North Carolina before coming to Washington in 1940.

He was a member of Mount Vernon Place United Methodist Church in Washington for more than 35 years. He had served on its board of stewards and as trustee and had been president of the A.B. Pugh Bible Class.

He is survived by his wife, Kate Nicholas Davis, of The Washington House: two sons, Wallace B. Jr., oc Mclean, and John N., of Asheville; a daughter, Mrs. Joseph Cope, of Raleigh, N.C., seven grandchildren and four great-grandchildren.