Olney is a community in Montgomery County, Maryland, home to about 35,797 people across 16 square miles. Its ZIP codes are 20832, 20833 and 20860, and parts of 20853 and 20906 are in Olney too.
Homes sold for a median of $284 per square foot across 3 ZIP codes in the three months ending August 2026, and 2 of 3 were seller’s markets.
Mostly Olney; also Ashton-Sandy Spring and Brookeville
Mostly Olney; also Ashton-Sandy Spring
Mostly Aspen Hill; part is in Olney
Mostly Aspen Hill; part is in Olney
Each card is that ZIP code’s whole market, including any part outside Olney. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Olney’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Olney well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Ronald Reagan Washington National Airport (DCA)20 miles away |
|---|---|
| Nearest city of 250,000+ | Washington, DC16 miles away |
| Nearest city of 1 million+ | Philadelphia, PA119 miles away |
Straight-line distances from the center of Olney; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Olney had 35,820 residents in the 2020 census, up 14% since 2000.
It’s the 31st largest of 527 towns in Maryland by population.
Montgomery County grew from 30,451 residents in 1900 to 1,062,061 in 2020.
Montgomery County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 87°F in summer, and winter lows average 27°F. About 41.5 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Rockville 1 Ne, MD weather station (5 miles away).
439,792 jobs at 27,677 businesses in Montgomery County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
605 doctors and other health care providers list an office in Olney’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 57 |
|---|---|
| Specialist doctors | 99 |
| Dentists | 63 |
| Nurse practitioners and physician assistants | 99 |
| Mental health providers | 145 |
| Physical and occupational therapists | 131 |
| Optometrists | 6 |
| Chiropractors | 5 |
| Pharmacies | 14 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (17 nearby)
Grocery stores (4 nearby)
Pharmacies (2 nearby)
Libraries (1 nearby)
Museums (1 nearby)
Theaters and performance venues (1 nearby)
Counts are within about 3 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1832.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Montgomery County Public Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Brooke Grove ElementaryOlney | Pre-K–5 | 390 | Public | 1.7 mi |
| Greenwood ElementaryBrookeville | Pre-K–5 | 534 | Public | 1.9 mi |
| Sherwood ElementarySandy Spring | Pre-K–5 | 498 | Public | 2.3 mi |
| Belmont ElementaryOlney | K–5 | 343 | Public | 2.8 mi |
| Olney ElementaryOlney | K–5 | 585 | Public | 0.8 mi |
| Rosa M. Parks MiddleOlney | 6–8 | 863 | Public | 2.3 mi |
| William H. Farquhar MiddleOlney | 6–8 | 682 | Public | 1.7 mi |
| Sherwood HighSandy Spring | 9–12 | 1,675 | Public | 3.0 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Sandy Springs Friends Middle SchoolSandy Spring | Pre-K–12 | 679 | Friends (Quaker) | 2.6 mi |
| St John's Episcopal SchoolOlney | Pre-K–8 | 154 | Episcopal | 1.2 mi |
| St Peter's SchoolOlney | Pre-K–8 | 431 | Roman Catholic | 1.0 mi |
| Olney Adventist PreparatoryOlney | K–8 | 93 | Seventh-day Adventist | 1.7 mi |
| Olney Adventist Preparatory SchoolOlney | K–8 | 92 | Seventh-day Adventist | 1.7 mi |
| Washington Christian AcademyOlney | K–12 | 289 | Christian (no specific denomination) | 1.3 mi |
| Community School of MarylandBrookeville | 3–12 | 46 | Nonsectarian | 5.0 mi |
| Our Lady of Good Counsel High SchoolOlney | 9–12 | 1,246 | Roman Catholic | 1.5 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
Buying or selling around Olney? Tell us what you need and when. No agents advertise here yet, so we’ll keep your request for up to 30 days and send it to local agents who join. No obligation, and you choose who to work with.
Loading map…
Shares ZIP codes with Aspen Hill, Glenmont, Wheaton, Leisure World, Layhill, Ashton-Sandy Spring, Cloverly and Brookeville.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.