Moses French Colby (July 2, 1795 – May 4, 1863) was a medical doctor and politician in Lower Canada.
In 1832, after qualifying as a physician in Lower Canada, Colby moved to Stanstead.
He was elected to the Legislative Assembly of Lower Canada for Stanstead in an 1837 by-election and served until March 27, 1838, when the province was put under the rule of a special council after the Lower Canada Rebellion.
He ran unsuccessfully in 1841 for a seat in the Legislative Assembly of the Province of Canada.
His son, Charles Carroll Colby, later represented Stanstead in the Canadian House of Commons.