Herman Dworkin, 55, the special assistant for international estimates to the deputy director for estimates of the Defense Intelligence Agency, died Dec. 21 at Georgetown University Hospital.

Mr. Dworkin, who lived in Kensington, was born in Poland. He came to this country in 1934 and settled in New York City. He graduated from the City College of New York. He served in the Army for three years in the early 1950s and retired from the Reserves in the 1970s with the rank of lieutenant colonel.

Mr. Dworkin moved to Washington in 1956. He took a master's degree at the School of Advanced International Studies at Johns Hopkins University and also graduated from the National War College and the NATO Defense College in Rome.

He began his career as an intelligence analyst with the Office of Naval Intelligence when he moved here. He joined the DIA when it was organized in 1963 and became a specialist in Soviet naval affairs. He received the DIA Director's Award for Meritorious Service in 1981.

He was a member of the Beth Tikva Synagogue in Rockville.

Survivors include his wife, Fay, and four sons, Kenneth, Bruce, Morris and James, all of Kensington; his mother, Miriam Dworkin of Israel, and two brothers, Harold, of Israel, and Bernard, of Dayton, Ohio.