John C. Jacobs (December 16, 1838 Lancaster County, Pennsylvania – September 22, 1894 Atlantic City, Atlantic County, New Jersey) was an American politician from New York.
In 1857, he became a reporter for the New York Express, was the paper's correspondent in Albany, New York, and was its war correspondent, accompanying the Peninsular Campaign. In 1865, he transferred to the New York World.
He was a Democratic member of the New York State Assembly (Kings Co., 9th D.) in 1867, 1868, 1869, 1870, 1871, 1872 and 1873. He was Chairman of the Committee on Ways and Means, participated in the corrupt proceedings of the Tweed Ring, and received bribes, for example a check for 2200 USD in June 1870.
He was a member of the New York State Senate from 1874 to 1885, sitting in the 97th, 98th, 99th, 100th, 101st, 102nd, 103rd, 104th, 105th, 106th, 107th and 108th New York State Legislatures. He was a delegate to the 1876 Democratic National Convention.