Mount Vernon is a city in and the county seat of Lawrence County, Missouri, United States. The population was 4,575 as of the 2010 census. It was estimated to be 4,508 by the City of Mount Vernon on July 1, 2019.Mount Vernon was platted in 1845. The city was named after Mount Vernon, the estate of George Washington. A post office called Mount Vernon has been in operation since 1846.Lawrence County Courthouse and Old Spanish Fort Archeological Site are listed on the National Register of Historic Places.According to the United States Census Bureau, the city has a total area of 3.87 square miles (10.02 km2), all land.
As of the census of 2010, there were 4,575 people, 1,810 households, and 1,101 families living in the city. The population density was 1,182.2 inhabitants per square mile (456.4/km2). There were 2,013 housing units at an average density of 520.2 per square mile (200.9/km2). The racial makeup of the city was 95.3% White, 0.4% African American, 1.3% Native American, 0.5% Asian, 0.6% from other races, and 1.9% from two or more races. Hispanic or Latino of any race were 2.1% of the population. There were 1,810 households, of which 31.3% had children under the age of 18 living with them, 42.5% were married couples living together, 14.3% had a female householder with no husband present, 4.0% had a male householder with no wife present, and 39.2% were non-families.
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