ZIP code 20191 is officially located in the state of Virginia, primarily serving the city of Zcta 20191. It falls under the administrative jurisdiction of Fairfax County. When planning mail delivery, logistics routing, or demographic research, 20191 operates within the Eastern Time (ET) timezone and supports the 631 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 20191 ZIP Code Tabulation Area is approximately 32,131. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $87,191.