Gideon Comstock (November 4, 1709 – 1801) was a Rhode Island politician and a Justice of the Rhode Island Supreme Court from May 1766 to June 1767, from June 1769 to June 1770, and from May 1779 to May 1781. Comstock was married three times, first to Ruth Arnold from March 3, 1738 to 1739; second to Freelove Arnold, widow of ; and third to Amy, who died October 7, 1811, aged eighty-eight. Comstock died in 1801, aged ninety-two years.