Old Jamestown, Missouri

Old Jamestown is an unincorporated community and census-designated place (CDP) in St. Louis County, Missouri, United States. The population was 19,184 at the 2010 census. Old Jamestown is northwest of the city of St. Louis and borders the Missouri River.

Geography
According to the United States Census Bureau, the CDP has a total area of 38.7 sqkm, of which 0.02 sqkm, or 0.06%, is water. The community is located mostly to the north and west of U.S. Route 67 in northern St. Louis County. West Alton is to the north, across the Missouri River. Florissant is to the southwest, and Black Jack and Spanish Lake are to the south. The CDP is located 17 mi north of downtown St. Louis.