| John Cochran Nicoll | |
| Office: | Judge of the United States District Court for the Northern District of Georgia Judge of the United States District Court for the Southern District of Georgia |
| Term Start: | August 11, 1848 |
| Term End: | January 19, 1861 |
| Appointer: | operation of law |
| Predecessor: | Seat established by 9 Stat. 280 |
| Successor: | John Erskine |
| Office1: | Judge of the United States District Court for the District of Georgia |
| Term Start1: | May 11, 1839 |
| Term End1: | August 11, 1848 |
| Appointer1: | Martin Van Buren |
| Predecessor1: | Jeremiah La Touche Cuyler |
| Successor1: | Seat abolished |
| Birth Name: | John Cochran Nicoll |
| Birth Date: | 7 October 1793 |
| Birth Place: | Savannah, Georgia |
| Death Place: | Savannah, Georgia |
| Education: | Litchfield Law School |
John Cochran Nicoll (October 7, 1793 – November 16, 1863) was a United States district judge of the United States District Court for the District of Georgia, the United States District Court for the Northern District of Georgia and the United States District Court for the Southern District of Georgia.
Born on October 7, 1793, in Savannah, Georgia, Nicoll attended Litchfield Law School. He entered private practice in Savannah. He was a recorder for Savannah. He was a member of the Georgia House of Representatives. He was solicitor for the Eastern Judicial Circuit of Georgia from 1821 to 1822. He was a Judge of the Savannah City Court from 1824 to 1834, and from 1835 to 1838. He was a Judge of the Superior Court of Georgia for the Eastern Judicial Circuit from 1834 to 1835. He was Mayor of Savannah.
Nicoll received a recess appointment from President Martin Van Buren on May 11, 1839, to a seat on the United States District Court for the District of Georgia vacated by Judge Jeremiah La Touche Cuyler. He was nominated to the same position by President Van Buren on January 23, 1840. He was confirmed by the United States Senate on February 17, 1840, and received his commission the same day. Nicoll was reassigned by operation of law to the United States District Court for the Northern District of Georgia and the United States District Court for the Southern District of Georgia on August 11, 1848, to a new joint seat authorized by 9 Stat. 280. His service terminated on January 19, 1861, due to his resignation.
Following his resignation from the federal bench, Nicoll was the Confederate District Attorney for the District of Georgia from 1861 to 1863. He died on November 16, 1863, in Savannah.