Census-designated place · Maryland
Olney, Maryland
Olney, census-designated place, in Montgomery County, Maryland. Olney had 35,797 people in the ACS 2020-2024 5-year estimates (±1,710). GEOID 2458900.
Residents, 2020-2024
35,797
±1,710 (90% margin)
2020 Census count: 35,820
Median household income
$171,458
±$6,994 (90% margin)
Maryland: $103,678
Median home value
$656,600
±$14,917 (90% margin)
Maryland: $419,900
Median gross rent
$2,404
±$267 (90% margin)
Maryland: $1,705
Where is Olney and what county is it in?
Olney is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Montgomery County, Maryland. It covers 16.2 square miles of land, 2,214 residents per square mile in 2020.
Olney is in the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan statistical area, which takes in 23 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Olney, and is it growing?
The 2020-2024 American Community Survey puts Olney's population at 35,797 (±1,710). The 2020 Census counted 35,820 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; Olney is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Olney | Montgomery County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 35,797 ±1,710 | 1,065,949 | no clear change |
| Households | 11,829 ±464 | 389,210 | no clear change |
| Average household size | 2.99 ±0.10 | 2.72 | no clear change |
| Housing units | 12,060 ±435 | 406,531 | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Olney?
The median resident of Olney is 41.6 years old; 26.2% are under 18 and 16.5% are 65 or older. The largest group is non-Hispanic white residents at 55.0%, then non-Hispanic Black residents at 14.4%. 21.2% of residents were born outside the United States.
| Measure | Olney | Montgomery County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 41.6 ±1.0 | 40.2 | no clear change |
| Under 18 years | 26.2% ±1.7 pts | 22.8% | – |
| 65 years and over | 16.5% ±1.5 pts | 17.0% | – |
| Male | 49.8% ±1.5 pts | 48.7% | – |
| Hispanic or Latino (any race) | 12.1% ±2.2 pts | 21.0% | +3.2 pts |
| White alone, not Hispanic | 55.0% ±2.6 pts | 39.5% | −8.2 pts |
| Black or African American alone, not Hispanic | 14.4% ±2.4 pts | 18.3% | no clear change |
| Asian alone, not Hispanic | 11.6% ±1.8 pts | 15.3% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 5.8% ±1.1 pts | 4.8% | – |
| Some other race alone, not Hispanic | 1.1% ±0.6 pts | 1.0% | – |
| Born outside the United States | 21.2% ±2.1 pts | 33.6% | no clear change |
| Speak a language other than English at home (age 5+) | 27.7% ±2.6 pts | 43.0% | – |
| Civilian veterans (age 18+) | 5.1% ±1.0 pts | 4.2% | – |
| With a disability | 9.8% ±2.0 pts | 9.4% | – |
| No health insurance coverage | 2.2% ±0.8 pts | 7.0% | no clear change |
| High school graduate or higher (age 25+) | 96.8% ±0.9 pts | 91.3% | – |
| Bachelor's degree or higher (age 25+) | 65.0% ±2.9 pts | 60.6% | no clear change |
| Graduate or professional degree (age 25+) | 31.5% ±2.4 pts | 33.4% | – |
| Lived in the same house a year earlier | 91.1% ±2.3 pts | 88.1% | – |
| Moved from another state in the past year | 2.1% ±0.9 pts | 3.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Olney earn?
Half of Olney's 11,829 households earn less than $171,458 a year (±$6,994), against $132,450 in Montgomery County and $103,678 in Maryland. In 2015-2019 it was $176,477 in 2024 dollars; the margins of error cannot tell the two periods apart. 4.3% of residents live below the poverty line.
| Measure | Olney | Montgomery County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $171,458 ±$6,994 | $132,450 | no clear change |
| Mean household income | $199,923 ±$10,384 | $181,376 | – |
| Per capita income | $67,351 ±$3,781 | $67,571 | no clear change |
| People below the poverty line | 4.3% ±1.2 pts | 7.5% | +1.6 pts |
| Children under 18 below the poverty line | 4.7% ±2.7 pts | 9.0% | – |
| Households receiving SNAP | 3.3% ±1.2 pts | 7.4% | – |
| Households with a computer | 98.8% ±0.8 pts | 98.2% | – |
| Households with a broadband subscription | 97.5% ±1.1 pts | 95.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Olney?
Owners occupy 89.2% of Olney's occupied homes and renters 10.8%. The median owner-occupied home is valued at $656,600 by its owner (±$14,917). The median renter pays $2,404 a month including utilities, and 45.4% of renters pay 35% or more of their income on rent.
| Measure | Olney | Montgomery County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $656,600 ±$14,917 | $640,300 | +$33,377 |
| Median gross rent | $2,404 ±$267 | $2,068 | no clear change |
| Renters paying 35% or more of income on rent | 45.4% ±11.2 pts | 41.9% | +16.4 pts |
| Median monthly owner costs, with a mortgage | $3,028 ±$91 | $2,929 | – |
| Owner-occupied homes | 89.2% ±2.4 pts | 65.3% | no clear change |
| Renter-occupied homes | 10.8% ±2.4 pts | 34.7% | – |
| Housing units | 12,060 ±435 | 406,531 | no clear change |
| Homeowner vacancy rate | 0.5% ±0.5 pts | 0.7% | – |
| Rental vacancy rate | 4.8% ±5.0 pts | 3.7% | – |
| Single-family detached homes | 67.0% ±2.6 pts | 46.6% | – |
| Mobile homes | 0.0% ±0.4 pts | 0.2% | – |
| Built 2020 or later | 1.1% ±0.6 pts | 1.3% | – |
| Built 2010 to 2019 | 6.4% ±1.4 pts | 8.8% | – |
| Built 1939 or earlier | 1.1% ±0.6 pts | 4.2% | – |
| Households with no vehicle | 1.6% ±0.7 pts | 8.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Olney work and get to work?
57.4% of Olney's workers drive alone and 32.1% work from home. The average trip to work takes 31.8 minutes. The unemployment rate in 2020-2024 averaged 3.6%.
| Measure | Olney | Montgomery County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 68.7% ±2.4 pts | 69.8% | – |
| Unemployment rate | 3.6% ±0.9 pts | 4.9% | no clear change |
| Drove alone to work | 57.4% ±3.3 pts | 52.8% | – |
| Carpooled | 5.7% ±1.6 pts | 7.6% | – |
| Public transportation | 1.9% ±0.7 pts | 7.5% | – |
| Walked | 1.9% ±1.0 pts | 1.7% | – |
| Worked from home | 32.1% ±3.2 pts | 28.3% | +25.0 pts |
| Mean travel time to work | 31.8 min ±1.4 | 31.9 min | −2.6 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Olney?
7 census tracts lie mostly in Olney, and 3 more reach into it (2020 census blocks). Their median household incomes run from $146,967 (Tract 7013.08) to $205,667 (Tract 7013.06).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 7013.12Montgomery County | 6,484 | $169,598 |
| Tract 7013.04Montgomery County | 6,280 | $190,583 |
| Tract 7013.08Montgomery County | 4,968 | $146,967 |
| Tract 7013.15Montgomery County | 4,218 | $161,264 |
| Tract 7013.13Montgomery County | 3,626 | $177,266 |
| Tract 7013.14Montgomery County | 2,907 | $170,660 |
| Tract 7013.06Montgomery County | 2,746 | $205,667 |
| Tract 7013.07Montgomery County | 4,538 | $193,542 |
| Tract 7013.17Montgomery County | 4,542 | $204,625 |
| Tract 7013.16Montgomery County | 6,451 | $160,313 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Olney) · Census block assignment files
How does Olney compare with other places in Maryland?
Olney ranks 40th of 322 places in Maryland with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 31st | 326 |
| Residents per square mile | 163rd | 326 |
| Median household income | 40th | 322 |
| Per capita income | 57th | 326 |
| Median home value | 32nd | 323 |
| Median gross rent | 43rd | 288 |
| Poverty rate | 190th | 230 |
| Bachelor's degree or higher | 35th | 325 |
| Median age | 127th | 326 |
| Owner-occupied share | 79th | 323 |
| Work from home | 30th | 293 |
| Travel time to work | 157th | 325 |
Olney's figures with every place in Maryland (CSV)
Every place in Maryland, sortable · Compare Olney with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Olney?
5 of the 57 figures for Olney on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Olney are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.