ZIP code
21045
Columbia, MD
21045 covers Columbia in Howard County, with 40,866 people in the ACS 2023 estimate.
Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 21045. Methodology
ZIP code map of 21045
About ZIP code 21045
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 21045. Not ACS. Methodology
People in 21045
Race
- White15,958
- Black or African American11,933
- American Indian or Alaska Native216
- Asian4,331
- Native Hawaiian and Pacific Islander27
- Other race2,719
- Two or more races4,137
Hispanic or Latino (any race): 5,335
Age
- Under 105,073
- 10 to 195,075
- 20 to 294,762
- 30 to 396,092
- 40 to 495,006
- 50 to 594,759
- 60 to 694,075
- 70 to 793,258
- 80 and older1,221
Income and housing in 21045
Education
- High school graduate93.5%
- Bachelor's degree57.4%
- Graduate degree31.8%
Places covering 21045
Cities and places — Population overlap
Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
- Columbia99.0%
- Ellicott City1.0%
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Counties — Population overlap
Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- Howard County100.0%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Population history for 21045
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 36,449 | |
| 2006 | 35,622 | |
| 2007 | 37,207 | |
| 2008 | 36,594 | |
| 2009 | 37,482 | |
| 2010 | 38,281 | |
| 2011 | 39,407 | 38,888 |
| 2012 | 40,367 | 38,940 |
| 2013 | 40,365 | 39,090 |
| 2014 | 39,832 | 38,220 |
| 2015 | 40,433 | 38,230 |
| 2016 | 39,426 | 37,140 |
| 2017 | 39,730 | 37,170 |
| 2018 | 39,946 | 36,910 |
| 2019 | 40,365 | 36,390 |
| 2020 | 40,265 | 36,680 |
| 2021 | 40,522 | 35,560 |
| 2022 | 40,980 | 36,420 |
| 2023 | 40,866 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 21045
12 nearest ZIP centroids (any distance)
- 21046Columbia2.2 miPop 15,433 · Income $126,549
- 21044Columbia2.7 miPop 44,775 · Income $132,924
- 21043Ellicott City3.7 miPop 47,134 · Income $141,846
- 21075Elkridge4.2 miPop 37,146 · Income $133,321
- 20794Jessup4.2 miPop 16,182 · Income $105,441
- 20763Savage4.8 miPop 2,320 · Income $119,083
- 20723Laurel5.2 miPop 36,319 · Income $129,870
- 20701Annapolis Junction5.5 miPop 749 · Income $81,763
- 21042Ellicott City6.1 miPop 43,021 · Income $190,504
- 21076Hanover6.1 miPop 23,642 · Income $143,409
- 21228Catonsville6.3 miPop 49,417 · Income $107,714
- 20759Fulton6.6 miPop 6,758 · Income $250,000+
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 21045, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
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ZIP code 21045 FAQ
- What city is ZIP code 21045 in?
- 21045 is in Columbia, MD.
- What county is 21045 in?
- 21045 is in Howard County.
- What is the median household income in 21045?
- The median household income in 21045 is $117,323.
- Which ZIP codes are near 21045?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 21045.