John Cochran Nicoll (October 7, 1793 – November 16, 1863) was a United States federal judge.
Nicoll was born in Savannah, Georgia. Litchfield (Tapping Reeve) Law School. Private practice, Savannah, Georgia. Recorder, City of Savannah, Georgia. Member, Georgia House of Representatives. He was a Solicitor, Eastern Circuit of Georgia from 1821 to 1822. He was a judge on the City Court, Savannah, Georgia from 1824 to 1834. He was a judge on the Superior Court, Eastern Circuit of Georgia from 1834 to 1835. He was a judge on the City Court, Savannah, Georgia from 1835 to 1838. Mayor, City of Savannah, Georgia,. He was a District attorney of Georgia, Confederate States of America from 1861 to 1863.
Nicoll was a federal judge on the United States District Court for the District of Georgia. Nicoll received a recess appointment from President Martin Van Buren on May 11, 1839, to a seat vacated by Jeremiah Cuyler. Formally nominated on January 23, 1840. He was confirmed by the United States Senate on February 17, 1840, and received his commission the same day. Nicoll's service was terminated on August 11, 1848, due to assignment to another court.
He died in Savannah, Georgia.