Louis H. Quinter, 69, an official of the Federal National Mortgage Association for 18 years before his retirement in 1968, died of cancer Wednesday at his home at Rossmoor Leisure World in Silver Spring.

Mr. Quinter, a native of Washington, attended the American Institute of Banking here and later worked for Riggs National Bank. He began his federal career about 1935 with the Reconstruction Finance Corp. He served in the Army Medical Corps during World War II and was stationed in the South Pacific.

He joined FNMA after the war and was a mortgage analyst at the time of his retirement. He was a resident of Chevy Chase until he moved to Leisure World about four years ago.

He was active in Rossmoor affairs, the Christ Child Society and the Meals on Wheels" program for elderly people.

He was a member of St. Patrick's Roman Catholic Church in Norbeck, and belonged to the Columbia Country Club and the Exchange Club of of Washington.

Survivors include his wife, Mary Z, of the home in Rossmoor; a son, William K. II, of Rockville; two daughters, Patricia L. Woolley, of Emmitsburg, Md., and Mary Grace Eckenrode, of Olney; a sister, Maude Cassidy Hall, of Sarasota, Fla., and 12 grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Little Sisters of the Poor, to SOME, in Washington, to the Wheaton Rescue Squad, or to a charity of one's choice.