Frederick, MD ZIP codes
Frederick, Maryland has 6 ZIP codes, including 1 PO Box ZIP. They are in Frederick County.
- Population in these ZIPs
- 154,625
- Avg. median income
- $113,700population-weighted
- Typical home value
- $463,100population-weighted
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Frederick, MD ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 21701 | Frederick County | 43,048 | $106,577 | $443,300 |
| 21702 | Frederick County | 49,605 | $106,983 | $451,900 |
| 21703 | Frederick County | 41,960 | $106,334 | $410,300 |
| 21704 | Frederick County | 20,006 | $161,063 | $644,600 |
| 21705 | Frederick County | 6 | — | — |
| 21709 PO Box | Frederick County | — | — | — |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Frederick
- Braddock Heights 6 mi
- Walkersville 6 mi
- Buckeystown 6 mi
- New Market 7 mi
- Ijamsville 8 mi
- Adamstown 8 mi
- Middletown 9 mi
- Monrovia 9 mi
- Libertytown 9 mi
- Jefferson 10 mi
- Woodsboro 10 mi
- Myersville 12 mi
Frequently asked questions
What is the ZIP code for Frederick, MD?
Frederick, MD has 6 ZIP codes: 21701, 21702, 21703, 21704, 21705 and 21709.
What county is Frederick, Maryland in?
Frederick ZIP codes are in Frederick County.
Which Frederick ZIP codes are PO Boxes?
21709 is a PO Box or single-organization ZIP code; it has no residential delivery area.