County ProfileMD
Howard County
Population: 332,317 · 21 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
332,317
People
Median age
39.8
Housing
Total households
121,065
Income
Median household income
$149,763
Housing
Total housing units
125,286
Employment
Employment rate
66%
Education
Bachelor’s degree or higher
64.5%
Healthcare
Insured population
95.8%
County details
Local time 02:10:04(ET)| Name | Howard |
|---|---|
| Total ZIP codes | 21total |
| ZIP codes (by type) | 19 Standard2 PO Box |
| Area code | 227, 240, 301, 410, 443, 667 |
| Timezone | Eastern Time (ET) |
| Coordinates | 39.2522639, -76.9244057 |
| Land area | 250.9 sq miles(650 km²) |
Map of Howard county, Maryland with ZIP codes
Cities and Communities in Howard County
Compare the largest cities in Howard County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.
| City | Population | Median incomeHousehold | ZIP codes |
|---|---|---|---|
| Columbia | 104,681 | $131,490 | 3ZIPs |
| Ellicott City | 75,947 | $156,964 | 3ZIPs |
| Elkridge | 25,171 | $139,913 | 1ZIPs |
| Clarksville | 12,919 | — | 1ZIPs |
| Woodbine | 8,956 | — | 1ZIPs |
| Woodstock | 7,657 | — | 1ZIPs |
| Savage | 7,542 | $116,895 | 1ZIPs |
| Fulton | 5,916 | $222,039 | 1ZIPs |
| Marriottsville | 5,686 | — | 1ZIPs |
| Glenwood | 3,373 | — | 1ZIPs |
| West Friendship | 2,532 | — | 1ZIPs |
| Glenelg | 2,318 | — | 1ZIPs |
| Dayton | 2,307 | — | 1ZIPs |
| Annapolis Junction | 1,195 | — | 1ZIPs |
| Highland | 1,133 | $250,001 | 1ZIPs |
| Cooksville | 937 | — | 1ZIPs |
| Lisbon | 282 | — | 1ZIPs |
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in Howard County
Review the most populated postal areas across Howard County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
| ZIP | City | Median incomeHousehold | Population (ZIP) |
|---|---|---|---|
| 21043 | Ellicott City | $148,125 | 48,775 |
| 21044 | Columbia | $135,057 | 44,284 |
| 21042 | Ellicott City | $190,061 | 43,147 |
| 21045 | Columbia | $118,563 | 39,321 |
| 21075 | Elkridge | $135,303 | 35,900 |
| 21046 | Columbia | $127,813 | 16,023 |
| 21029 | Clarksville | $243,542 | 12,919 |
| 21797 | Woodbine | $189,241 | 8,956 |
| 21163 | Woodstock | $134,672 | 7,657 |
| 20759 | Fulton | $250,001 | 6,562 |
| 21104 | Marriottsville | $191,804 | 5,686 |
| 20777 | Highland | $226,146 | 3,527 |
| 21738 | Glenwood | $250,001 | 3,373 |
| 20763 | Savage | $76,842 | 2,745 |
| 21794 | West Friendship | $231,466 | 2,532 |
| 21737 | Glenelg | $250,001 | 2,318 |
| 21036 | Dayton | $218,036 | 2,307 |
| 20701 | Annapolis Junction | $85,594 | 1,195 |
| 21723 | Cooksville | $241,250 | 937 |
| 21041 | Ellicott City | — | — |
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS