 The only airport located in Ramsey County is Saint Paul Downtown Airport, a smaller commercial airport with three runways primarily used for general aviation and military operations.As of the 2010 Census, there were 508,640 people, 202,691 households, and 117,799 families living in the county.The racial makeup of the county was 70.1% White, 11.0% Black or African American, 0.8% Native American, 11.7% Asian, 2.9% from other races, and 3.5% from two or more races.