John Jospeh Behabetz, 65, a retired vice president of the Riggs National Bank and manager of its Dupont Circle branch, died of congestive heart failure Feb. 20 at his home at Fripp Island, S.C.

Mr. Behabetz was born in Washington and graduated from McKinley Technical High School. He began his career at Riggs as a messenger in 1937. He later graduated from the Washington chapter of the American Institute of Banking and the Stonier Graduate School of Banking at Rutgers University. He served in the Marine Corps in the Pacific in World War II.

Except for the years 1964 to 1967, when he was vice president and manager of the Riggs branch at Connecticut Avenue and T Street, NW., Mr. Behabetz spent most of his career at the Dupont Circle branch. He worked at Dupont Circle after the war and was vice president and manager there from 1967 until he retired in 1979. He moved to South Carolina at that time.

Mr. Behabetz taught at the American Institute of Banking. He was a past treasurer of the Connecticut Avenue Business Men's Association and a former chairman of the safe deposit section of the D.C. Bankers Association. He also was a member of the National Numismatic Society.

Survivors include his wife, Grace R., of Fripp Island; two children, Mark J., of Waldorf, Md., and Paula I., of Hilton Head, S.C.; two sisters, Helen Walter of Kensington, and Teresa Cook of Silver Spring, and two grandchildren.