Arnold Kotz, 60, a senior policy analyst with the National Planning Association, died of a heart attack Sunday while playing tennis during a vacation in Sarasota, Fla.

He had been with the association since 1971. He had designed and directed the compilation of "A Policy Analysis Source Book for Social Programs," published in March, 1976.

Widely used as a reference book by government agencies, libraries, universities and other private organizations, the book was commended by members of Congress.

Mr. Kotz worked for the Defense Department from 1946 to 1964 and became deputy director in the office of the assistant secretary for international security affairs.

In 1962, he was assigned to direct a task force for the head of the Federal Aviation Agency to make a study of airports in this country and of national aviation goals.

After leaving the Defense Department, Mr. Kotz became a private consuitant on vocational and environmental education, mass transportation, family planning and other matters.

From 1966 to 1969, he was senior economist with the Stanford Research Institute in California. During that period, he directed an evaluation of firearms, violence and civil disorders for President Johnson's National Commission of Civil Disorders.

From 1969 until 1971, Mr. Kotz conducted graduate seminars on program planning and evaluating as George Washington University.

Born in Watkins Glen, N.Y., he was a graduate of New York University. He later earned a master's degree in public administration from American University. He was a former president of the American Society for Public Administration.

Mr. Kotz came to Washington in 1941 to work as a program analyst with the Lend Lease Administration. He served with the Army in World War II.

He was well known as a tennis player here. He was singles champion for many years at the St. Albans Tennis Club and had won a number of local tournaments. As a youth, he had been New Jersey state champion for two years.

He is survived by his wife, Shirely, and a son, Michael, of the home in Bethesda; another son, Richard, of Blacksburg, Va.; a daughter, Ellen, of Eugene, Ore.; a brother, Gerald, of Rosslyn, N.Y., and three sisters, hilda Krinzman and Ruth Yankowitz, both of Boca Raton, Fla., and Sylvia Kotz, of Miami Beach.