He was born on August 4, 1884, in Berlinez, then a village in the Podolia Governorate of the Russian Empire, now located in the Bar Raion, Vinnytsia Oblast, Ukraine. He emigrated to the United States in 1900. He attended the evening schools in New York City, and graduated from the College of the City of New York in 1910, and LL.B. from New York Law School in 1913. On August 18, 1918, he married Dora Polsky (c.1897–1970).
He was a member of the New York State Assembly (Bronx Co., 3rd D.) in 1921 and 1922. In 1921, the Citizens Union endorsed Antin for re-election, saying that he was "intelligently active in behalf of housing reform bills."
He was a member of the New York State Senate (22nd D.) from 1923 to 1930, sitting in the 146th, 147th, 148th, 149th, 150th, 151st, 152nd and 153rd New York State Legislatures; and was Chairman of the Committee on Education from 1923 to 1924.
- New York Red Book (1922, pg. 97)
- M'CALL POINTS WAY FOR LAW GRADUATES in NYT on June 12, 1913
- Antin—Polsky in NYT on August 19, 1918
- MRS. BENJAMIN ANTIN in NYT on February 16, 1970 (subscription required)
- CITIZEN UNION GIVES LINE ON CANDIDATES in NYT on October 26, 1921
- Mr. Antin Writes a Stark Book on State Politics in NYT on March 27, 1927 (subscription required)
- BENJAMIN ANTIN, EX-STATE SENATOR in NYT on October 23, 1956 (subscription required)
|New York Assembly|
Samuel A. DeWitt
|New York State Assembly
Bronx County, 3rd District
Julius S. Berg
|New York State Senate|
|New York State Senate
Julius S. Berg