John Lewis Gervais (1741–1798) was an American planter and statesman from South Carolina.
John was born in Hanover, Germany where his parents were French Huguenot refugees in 1741.
On 10 September 1782, he voted for a motion that the secretary for foreign affairs be directed to obtain returns of slaves and property carried off by the enemy during the war, such information to be used in negotiating a peace.
In April 1783, he was a member of a committee to which were referred letters from U.S. representatives abroad, and on 15 April of that year favored instructing the commander-in-chief to arrange with the commander of the British forces for receiving possession of the posts in the United States that were occupied by British troops.
In 1786, Senator Gervais led the efforts in the legislature to establish a new state capital.