All ZIP Codes, Map and Demographics of Washington, DC

Data labeled as "All ZIP Codes" is a total (or average) for every ZIP Code in Washington, DC. The U.S. Postal Service provides a name (and aliases) for every ZIP Code which can include cities, towns, villages, and other incorporated names. A ZIP Code is included in the total when it's primary name or an alias matches Washington, DC.

Data labeled as "Place" or "U.S. Census Place" includes only the data for the U.S. Census Place Washington city; District of Columbia (Place FIPS: 1150000). The U.S. Census Bureau defines census places as geographic areas that include both incorporated places and census designated places (CDPs). Incorporated places are defined by the laws of the states in which they are contained. CDPs are defined by the Census Bureau for statistical purposes only. CDPs are closely settled, unincorporated communities that are locally recognized and identified by name. Census places can be thought of as: Municipalities, Cities, Towns, Villages, and Boroughs.

Place Data can generally be analogous to the "City Limits" or "Town Limits" (unless denoted as a CDP). The All ZIP Codes data is analogous to the wider area known by the same name, just including areas outside the incorporated city/town limits. The USPS created ZIP Codes for the expedient delivery of mail. Their boundaries are based on mail routes and delivery points rather than geographic factors or jurisdiction boundaries.