Olney, MD Demographics

A map of Olney's Population by Race

Olney, Maryland has an estimated population of 35,797, a less than 1% change from the 35,820 recorded in the 2020 Census. The population is 55.0% White, 14.4% Black, 12.1% Hispanic, 11.6% Asian, 5.8% Multiracial, and 1.1% Native American/Other. This demographic dot map shows the population of Olney, with one dot drawn for each person counted by the Census, color-coded by race.

Olney has become more racially diverse since the 2020 Census. It is less diverse than Maryland overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Olney, that probability was 61.0% in 2020 and 64.5% in the most recent ACS estimates.

Olney is ranked the 31st most populous place in Maryland, out of 536 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Olney was ranked the 30th most populous place in the 2020 Census.

Olney's White Population

19,686 residents of Olney, or 55.0% of the population, identify as White. The share of White residents in Olney is higher than in Maryland overall, where 46.6% of the population is White. Olney ranks 349th statewide in terms of White residents as a share of the population, out of 536 places.

Since the 2020 Census, Olney's White population has declined by an estimated 6.5%. White residents' share of Olney's population has decreased from 58.8% to 55.0%.

Olney is more White than neighboring Aspen Hill (31.3% White), and Layhill (20.6% White). Olney is less White than neighboring Brookeville (86.3% White), Leisure World (57.4% White), and Ashton-Sandy Spring (63.8% White).

Olney's Black Population

5,159 residents of Olney, or 14.4% of the population, identify as Black. The share of Black residents in Olney is considerably lower than in Maryland overall, where 28.9% of the population is Black. Olney ranks 225th statewide in terms of Black residents as a share of the population, out of 536 places.

Since the 2020 Census, Olney's Black population has grown by an estimated 18.2%. Black residents' share of Olney's population has increased from 12.2% to 14.4%.

Olney is more Black than neighboring Brookeville (0% Black), and Ashton-Sandy Spring (11.9% Black). Olney is less Black than neighboring Leisure World (22.6% Black), Aspen Hill (15.1% Black), and Layhill (42.2% Black).

Olney's Asian Population

4,148 residents of Olney, or 11.6% of the population, identify as Asian. The share of Asian residents in Olney is higher than in Maryland overall, where 6.5% of the population is Asian. Olney ranks 40th statewide in terms of Asian residents as a share of the population, out of 536 places.

Since the 2020 Census, Olney's Asian population has declined by an estimated 8.5%. Asian residents' share of Olney's population has decreased from 12.6% to 11.6%.

Olney is more Asian than neighboring Brookeville (0% Asian), Leisure World (11.4% Asian), Aspen Hill (9.4% Asian), and Ashton-Sandy Spring (7.8% Asian). Olney is less Asian than neighboring Layhill (14.8% Asian).

Olney's Hispanic Population

4,341 residents of Olney, or 12.1% of the population, identify as Hispanic. The share of Hispanic residents in Olney is comparable to the share in Maryland overall, where 12.5% of the population is Hispanic. Olney ranks 123rd statewide in terms of Hispanic residents as a share of the population, out of 536 places.

Since the 2020 Census, Olney's Hispanic population has grown by an estimated 14.1%. Hispanic residents' share of Olney's population has increased from 10.6% to 12.1%.

Olney is more Hispanic than neighboring Leisure World (6.6% Hispanic), and Ashton-Sandy Spring (10% Hispanic). Olney is less Hispanic than neighboring Brookeville (12.4% Hispanic), Aspen Hill (36.6% Hispanic), and Layhill (12.6% Hispanic).

Olney's Native American/Other Population

386 residents of Olney, or 1.1% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Olney is comparable to the share in Maryland overall, where 0.8% of the population is Native American/Other. Olney ranks 288th statewide in terms of Native American/Other residents as a share of the population, out of 536 places.

Since the 2020 Census, Olney's Native American/Other population has grown by an estimated 67.8%. Native American/Other residents' share of Olney's population has increased from 0.6% to 1.1%.

Olney is more Native American/Other than neighboring Brookeville (0% Native American/Other), Leisure World (0.6% Native American/Other), and Ashton-Sandy Spring (0% Native American/Other). Olney is less Native American/Other than neighboring Aspen Hill (2.7% Native American/Other), and Layhill (3.5% Native American/Other).

Olney's Multiracial Population

2,077 residents of Olney, or 5.8% of the population, identify as Multiracial. The share of Multiracial residents in Olney is comparable to the share in Maryland overall, where 4.6% of the population is Multiracial. Olney ranks 159th statewide in terms of Multiracial residents as a share of the population, out of 536 places.

Since the 2020 Census, Olney's Multiracial population has grown by an estimated 13.6%. Multiracial residents' share of Olney's population has increased from 5.1% to 5.8%.

Olney is more Multiracial than neighboring Brookeville (1.2% Multiracial), Leisure World (1.5% Multiracial), and Aspen Hill (4.9% Multiracial). Olney is less Multiracial than neighboring Ashton-Sandy Spring (6.5% Multiracial), and Layhill (6.3% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.