Isaac Bacharach (January 5, 1870 – September 5, 1956) was an American Republican Party politician from New Jersey who represented the 2nd congressional district from 1915 to 1937.
Born in Philadelphia, Bacharach moved to New Jersey in 1881 with his parents.
They settled in Atlantic City, where he attended the public schools.
He entered the real-estate business and also became interested in the lumber business and in banking.
He served as member of the council of Atlantic City from 1905 to 1910, and served as a member of the New Jersey General Assembly in 1911.
His brother, Harry Bacharach, was also involved in Atlantic City politics and served several terms as mayor.