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The Washington metropolitan area, also known as the National Capital Region or DMV, is a metropolitan area encompassing Washington, D.C. and its surrounding suburbs in Maryland, Virginia, and West Virginia. It has a population of over 6.3 million, a GDP of over $660 billion, and is home to many federal agencies, cultural institutions, and transportation hubs.
Find out which U.S. cities have the highest number of people per square mile, based on the 2020 U.S. Census data. See the rankings, population, land area, and density of incorporated places in the 50 states and the District of Columbia.
Learn about the 273 active municipalities in Colorado, including 73 cities and 198 towns, and their types of government, population, area, and density. Find out the oldest, newest, and most extensive municipalities in the state.
Find out the names, locations, and functions of the five commercial airports and other airfields in Greater Los Angeles, the second-largest urban region in the US. Learn about the passenger and cargo traffic, the rail and bus connections, and the history of each airport.
A ZIP Code is a system of postal codes used by the United States Postal Service to sort and deliver mail more efficiently. It consists of five digits, followed by an optional four-digit extension called ZIP+4.
Find out which ZCTAs or ZIP Code Tabulation Areas in the United States have the highest median household and per capita incomes. See the rankings, population, and designation of each ZCTA based on census data.
ZIP Code Tabulation Areas (ZCTAs) are statistical entities developed by the U.S. Census Bureau for tabulating summary statistics. They are generalized area representations of the U.S. Postal Service (USPS) ZIP code service areas, but are not the same as ZIP codes.
Find the three-digit ZIP code prefix, the state, and the USPS Sectional Center Facility for any ZIP code in the United States. The web page does not show the five-digit ZIP codes for each prefix, but you can use the links to search for them.