Julian W. Feiss, 76, a former editor of the Mining Congress Journal and a retired official with the Interior Department, died Sept. 9 at his home in Del Mar, Calif. He had cancer.

Mr. Feiss was an assistant to the director of the Interior Department's Bureau of Mines from 1947 to 1951. During these years, he also served as a delegate to the United Nations and worked with the Defense Procurement Agency.

After spending the next 10 years as a staff geologist with the Kennecott Copper company in New York, he returned to Washington and the government. In 1961, he joined the office of the assistant secretary of the Interior for mineral resources. He later was executive secretary of the Federal Metal and Nonmetal Mine Safty Advisory Committee before retiring from the government in 1973.

Mr. Feiss was a native of Cleveland. He was a 1927 graduate of Princeton University, where he earned a bachelor's degree in geology. He earned a master's degree in engineering and economic geology at the Arizona School of Mines.

He was a mining engineer for a British firm in Africa and then was a consulting engineer with a firm in Cleveland. His next job was with the Climax Molybdenum Co. in Colorado, where he was a transportation engineer.

During World War II, he served with military intelligence in Africa and rose to the rank of major. After the war, he was editor of the American Mining Congress Journal, the official publication of the American Mining Congress. He held that job for two years before joining the Interior Department.

A former resident of Falls Church and Washington, Mr. Feiss had made his home in Del Mar, Calif., since May 1979.

He was a member of the Cosmos and Explorers clubs and had been active in the Society of Economic Geologists and the American Institute of Mining Engineers.

Survivors include his wife, the former Anna Frances Gloyd, of Del Mar; a son, Dr. Paul G., of Chapel Hill, N.C.; a brother, Carl, of Gainesville, Fla.; a sister, Gertrude Feiss of New York City, and six grandchildren.