County ProfileMD
Frederick County
Population: 271,717 · 28 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
271,717
People
Median age
39
Housing
Total households
104,635
Income
Median household income
$122,002
Housing
Total housing units
108,924
Employment
Employment rate
66.9%
Education
Bachelor’s degree or higher
45.8%
Healthcare
Insured population
95.3%
County details
Local time 03:15:05(ET)| Name | Frederick |
|---|---|
| Total ZIP codes | 28total |
| ZIP codes (by type) | 23 Standard4 PO Box1 Unique |
| Area code | 227, 240, 301, 410, 443, 667 |
| Timezone | Eastern Time (ET) |
| Coordinates | 39.4701764, -77.3976363 |
| Land area | 660.6 sq miles(1,711 km²) |
Map of Frederick county, Maryland with ZIP codes
Cities and Communities in Frederick County
Compare the largest cities in Frederick 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 |
|---|---|---|---|
| Frederick | 78,171 | $97,069 | 6ZIPs |
| Brunswick | 7,762 | $118,025 | 1ZIPs |
| Ijamsville | 7,115 | — | 1ZIPs |
| Thurmont | 6,213 | $98,125 | 1ZIPs |
| Walkersville | 6,156 | $130,893 | 1ZIPs |
| Middletown | 4,943 | $173,333 | 1ZIPs |
| Knoxville | 4,809 | — | 1ZIPs |
| Braddock Heights | 3,075 | $124,000 | 1ZIPs |
| Keymar | 2,870 | — | 1ZIPs |
| Emmitsburg | 2,770 | $81,250 | 1ZIPs |
| Monrovia | 2,702 | $207,153 | 1ZIPs |
| Jefferson | 2,697 | $150,854 | 1ZIPs |
| Adamstown | 2,331 | $195,625 | 1ZIPs |
| Point of Rocks | 1,886 | $159,708 | 1ZIPs |
| Myersville | 1,748 | $149,726 | 1ZIPs |
| New Market | 1,525 | $202,872 | 1ZIPs |
| Rocky Ridge | 1,145 | — | 1ZIPs |
| Woodsboro | 1,092 | $116,964 | 1ZIPs |
| Buckeystown | 1,072 | $133,611 | 1ZIPs |
| Libertytown | 984 | $113,865 | 1ZIPs |
| Sabillasville | 470 | — | 1ZIPs |
| Burkittsville | 142 | $93,250 | 1ZIPs |
| Tuscarora | 93 | — | 1ZIPs |
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in Frederick County
Review the most populated postal areas across Frederick County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
| ZIP | City | Median incomeHousehold | Population (ZIP) |
|---|---|---|---|
| 21702 | Frederick | $106,983 | 46,412 |
| 21703 | Frederick | $106,334 | 41,138 |
| 21701 | Frederick | $106,577 | 39,629 |
| 21704 | Frederick | $161,063 | 19,275 |
| 21774 | New Market | $171,103 | 15,496 |
| 21769 | Middletown | $151,563 | 11,759 |
| 21788 | Thurmont | $98,856 | 11,491 |
| 21793 | Walkersville | $121,971 | 10,447 |
| 21770 | Monrovia | $183,571 | 7,575 |
| 21754 | Ijamsville | $182,188 | 7,115 |
| 21716 | Brunswick | $109,382 | 6,753 |
| 21727 | Emmitsburg | $95,236 | 6,593 |
| 21755 | Jefferson | $137,417 | 5,627 |
| 21773 | Myersville | $161,908 | 5,410 |
| 21758 | Knoxville | $111,528 | 4,809 |
| 21710 | Adamstown | $163,864 | 4,769 |
| 21757 | Keymar | $100,500 | 2,870 |
| 21798 | Woodsboro | $116,607 | 2,366 |
| 21777 | Point of Rocks | $159,708 | 1,890 |
| 21780 | Sabillasville | $83,785 | 1,688 |
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