Donald I. Hamilton, 60, a vice president of Riggs National Bank and a lifelong resident of the Washington area, died at Holy Cross Hospital in Silver Spring Tuesday of cardiac arrest.

Mr. Hamilton was born in Washington and graduated from St. John's College High School. He was a graduate of the Georgetown University School of Foreign Service and also had studied at the American Institute of Banking.

After World War II service in the Army, he worked for the Army Security Agency in Washington.

He joined Riggs in 1949, and worked for 19 years in the bank's Dupont Circle office. By 19658 he was an assistant vice president and assistant manager. In 1968, when the bank opened its L' Enfant Plaza office, Mr. Hamilton was named manager.

He was elected a vice president in 1970, and remained at L'Enfant Plaza until 1976, when he moved to the banking operations department of the main office.

Mr. Hamilton was a financial adviser on the parish council of St. Bernadette's Catholic Church in Silver Spring. He also was a member of the Men of St. John's Association and the Georgetown University Alumni Association.

Survivors include his wife, Shirley, of the home in Silver Spring; two children, Donald Andrew, of Silver Spring, and Karen Gabrielle, of the home, and a twin brother, Richard E., of Escondido, Calif.

The family suggests that expressions of sympathy be in the form of contributions to the Over-60 Counseling and Employment Service, 4700 Norwood Dr., Chevy Chase, Md., 20015