Olney, MD ZIP codes
Olney, Maryland has 2 ZIP codes, including 1 PO Box ZIP. They are in Montgomery County.
- Population in these ZIPs
- 25,553
- Avg. median income
- $168,500population-weighted
- Typical home value
- $650,600population-weighted
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Olney, MD ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 20830 PO Box | Montgomery County | — | — | — |
| 20832 | Montgomery County | 25,553 | $168,524 | $650,600 |
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 Olney
- Sandy Spring 2 mi
- Derwood 3 mi
- Brinklow 4 mi
- Ashton 4 mi
- Brookeville 4 mi
- Washington Grove 6 mi
- Highland 6 mi
- Rockville 6 mi
- Spencerville 6 mi
- Gaithersburg 7 mi
- Dayton 7 mi
- Glenelg 7 mi
Frequently asked questions
What county is Olney, Maryland in?
Olney ZIP codes are in Montgomery County.
Which Olney ZIP codes are PO Boxes?
20830 is a PO Box or single-organization ZIP code; it has no residential delivery area.