Mount Vernon is a town in Franklin County, Texas, United States. It is the Franklin County seat, and the population was 2,286 at the 2000 census. According to the United States Census Bureau, the town has a total area of 3.7 square miles (9.6square kilometers),all of it land. As of the census of 2000, there were 2,286 people, 903 households, and 582 families residing in the town. The population density was 618.7 people per square mile (239.2 square kilometers). There were 1,045 housing units at an average density of 282.8 per square mile (109.3 square kilometers). The racial makeup of the town was 77.21% White, 13.52% African American, 0.61% Native American, 0.31% Asian, 7.17% from other races, and 1.18% from two or more races. Hispanic or Latino of any race were 10.80% of the population.