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City ZIP codes · Maryland

Columbia, MD ZIP Codes

3 ZIP codes use the postal name Columbia, Maryland (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. Median household income runs from $118,563 in 21045 to $135,057 in 21044 (Census Bureau, ACS 2020-2024). Columbia's most populous ZIP code is 21044, with 44,114 people (ACS 2020-2024); 95% of its land is in the city of Columbia.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Columbia's ZIP codes?

21044: $135k median household income21045: $119k median household income21046: $128k median household income21044210462104521044: $135k median household income21045: $119k median household income21046: $128k median household income21044210462104521044: $135k median household income21045: $119k median household income21046: $128k median household income210442104621045
The 3 residential ZIP codes named Columbia, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are Columbia's ZIP codes?

The highest median household income is in 21044 ($135,057), the lowest in 21045 ($118,563). Home values run from $453,700 in 21045 to $566,500 in 21044.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 3 residential ZIP codes of Columbia

Residential ZIP codes with the postal name Columbia, MD, largest first (ACS 2020-2024); sort by any column
County
21044 Howard County 44,114 3,711 $135k $567k
21045 Howard County 40,034 4,128 $119k $454k
21046 Howard County 15,608 1,998 $128k $480k

Download the 3 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

Which counties do Columbia's ZIP codes reach?

Columbia's residential ZIP codes lie in Howard County.

Which first three digits do Columbia's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Columbia starts with 210.

Three-digit prefixes of Columbia's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Columbia's
PrefixSectional centerHereAll codes
210 Linthicum, MD (SCF 210) 3 58

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.