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ZIP Code 21045
Columbia, MD, Howard County
Population
40,034
Land area
9.7sq mi
People per sq mi
4,128
City
Columbia
ZIP 21045 and nearby ZIP codes
ZIP 21045 at a glance
- ZIP 21045 (Columbia) is about 6.5 times as dense as Maryland as a whole.
- The median household income is $118,563, 14% above the Maryland median of $103,678.
- A typical owner-occupied home is valued at $453,700 (8% above Maryland) and median rent is $1,777 a month.
Local data for ZIP 21045
Counts from official public data
Housing and community stats
ZIP 21045, American Community Survey 2020-2024
Median household income
$118,563
Poverty rate
8.6%
Median home value
$453,700
Prices +1.1% in a year
Median rent
$1,777/mo
Homeownership
68.3%
Bachelor's or higher
56.6%
Median age
39.6
Average commute
27.3 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
1,410
ZIP Business Patterns 2023
Employees
22,695
$1.4B annual payroll
PPP loans
$167M
1,664 loans
Campaign donations
$254K
51% D, 6% R, 2026 cycle
Environment and hazard risk
ZIP 21045, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: winter weather
Storm events since 1996
911
Countywide, mostly thunderstorm wind
Flood insurance policies
816
0.8% of homes, county
July high / Jan low
89° / 25°F
45.0 inches of rain a year
Health statistics
Share of adults in ZIP 21045, CDC PLACES estimates
Obesity
33.5%
U.S. 33.3% about the same
Diabetes
11.3%
U.S. 12.1% -0.8 pts
Smoking
8.7%
U.S. 12.8% -4.1 pts
Uninsured (18-64)
7.5%
U.S. 11.1% -3.6 pts
Frequently asked questions
- What city is ZIP code 21045?
- ZIP code 21045 is in Columbia, MD (Howard County).
- What county is ZIP code 21045 in?
- ZIP code 21045 is mostly in Howard County, Maryland.
- How many people live in ZIP code 21045?
- About 40,034 people live in the 21045 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.