John Chambers Eldridge (1872 — 17 April 1954), Australian politician, was the Member for the Division of Martin in the Australian House of Representatives from 12 October 1929 to 19 December 1931.
Eldridge was the son of John Reuben Eldridge and Caroline Chambers. On 23 October 1895 he married Marie Mertel, a saleswoman born in Berlin, Germany, and together they had five daughters and one son. In 1916, he enlisted in the Australian Imperial Force.
Eldridge was an accountant for the Government of New South Wales before he was elected to the Parliament as a member of the Australian Labor Party. He represented Martin until 1931, when he attempted to transfer to the nearby seat of Barton as a member of the Lang Labor Party but was defeated by the United Australia Party candidate. He died in 1954 at the age of 82.