Isidore Dollinger (November 13, 1903 – January 30, 2000) was an American lawyer, jurist, and politician who served five terms in the U.S. House of Representatives, representing New York from 1949 to 1959.

Dollinger was born on November 13, 1903, in New York City.

He was a member of the New York State Assembly (Bronx County, 4th District) in 1937, 1938, 1939–40, 1941–42 and 1943–44.

Dollinger was elected as a Democrat to the 81st, 82nd, 83rd, 84th, 85th and 86th United States Congresses, holding office from January 3, 1949, to December 31, 1959, when he resigned to take office as District Attorney of Bronx County.

He was a Justice of New York Supreme Court (1st District) from 1969 to 1973, and an Official Referee (i.e. a senior judge on an additional seat) of the Supreme Court from 1974 to 1975.