Potomac, MD ZIP codes
Potomac, Maryland has 2 ZIP codes, including 1 PO Box ZIP. They are in Montgomery County.
- Population in these ZIPs
- 50,498
- Avg. median income
- $250,000population-weighted
- Typical home value
- $1,263,000population-weighted
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Potomac, MD ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 20854 | Montgomery County | 50,498 | $250,001 | $1,263,000 |
| 20859 PO Box | Montgomery 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 Potomac
- Rockville 4 mi
- Washington Grove 4 mi
- Gaithersburg 4 mi
- Germantown 5 mi
- Derwood 6 mi
- Bethesda 7 mi
- Montgomery Village 7 mi
- Garrett Park 7 mi
- Cabin John 8 mi
- Kensington 9 mi
- Boyds 9 mi
- Olney 9 mi
Frequently asked questions
What county is Potomac, Maryland in?
Potomac ZIP codes are in Montgomery County.
Which Potomac ZIP codes are PO Boxes?
20859 is a PO Box or single-organization ZIP code; it has no residential delivery area.