Columbia, MD ZIP Codes
4 ZIP codes serve Columbia, Maryland: 21044, 21045, 21046 and 21029. Together they are home to 113,363 residents in 43,928 households. Median household income ranges from $118,563 in 21045 to $243,542 in 21029.
Columbia Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 104,338 |
| Households | 41,143 |
| Median household income | $131,490 |
| Median home value | $497,400 |
| Median age | 39.4 |
| Median rent | $2,042 |
All 4 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 113,363 |
| Households (sum of ZIP codes) | 43,928 |
| Median household income, range across ZIP codes | $118,563 (21045) to $243,542 (21029) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $138,269 |
| Homeowners | 66.9% |
| Households with kids under 18 | 31.0% |
| Moved in the past year | 12.1% |
| Carrier routes in EDDM2GO's route library | 79 routes, 46,068 homes (4 of 4 ZIP codes) |
Top facts
- Highest median household income in Columbia: 21029 ($243,542)
- Most residents: 21044 (44,114 people)
- Highest homeownership: 21029 (93.6% own their home)
- Most households with kids: 21029 (51.4% of households)
- Most new movers: 21044 (13.0% moved in last year)
- Youngest median age: 21046 (37.3 years)
- Highest median home value: 21029 ($912,100)
Every ZIP code in Columbia
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 21044 | Columbia | 44,114 | 18,293 | $135,057 | $566,500 | 60.3% | 26.1% | 13.0% | 30 | 21,235 | 95% of its land; mailing city |
| 21045 | Columbia | 40,034 | 15,414 | $118,563 | $453,700 | 68.3% | 31.4% | 12.3% | 25 | 16,589 | 99% of its land; mailing city |
| 21046 | Columbia | 15,608 | 6,165 | $127,813 | $479,500 | 65.1% | 31.3% | 12.1% | 14 | 7,392 | 100% of its land; mailing city |
| 21029 | Clarksville | 13,607 | 4,056 | $243,542 | $912,100 | 93.6% | 51.4% | 8.8% | 10 | 4,321 | 16% of its land |
A ZIP code is listed for Columbia when at least 10% of its land lies inside the Columbia Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Columbia. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Columbia.
Counties
- Howard County — 24 ZIP codes
Price a mailing to Columbia ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Columbia, MD?
- 21044, 21045, 21046 and 21029. A ZIP code is listed for Columbia when at least 10% of its land lies inside the Columbia Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Columbia.
- What is the population of Columbia, MD?
- The Census Bureau counts 104,338 residents inside Columbia Census-designated place (ACS 2020–2024). The 4 ZIP codes that serve Columbia hold 113,363 residents in all.
- What is the median household income in Columbia, MD?
- $131,490 inside Columbia Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $118,563 to $243,542.
- Which Columbia ZIP code has the highest median household income?
- 21029, at $243,542, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Columbia, MD?
- For the 4 of 4 ZIP codes in EDDM2GO's stored route library: 79 carrier routes reaching 46,068 residential and 3,464 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.