Montgomery County Demographics

A map of Montgomery County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	420,862	430,980	39.5%	40.6%
Hispanic	223,958	217,409	21.0%	20.5%
Black	194,756	192,714	18.3%	18.1%
Asian	163,089	162,472	15.3%	15.3%
Multiracial	51,066	48,080	4.8%	4.5%
Native American/Other	12,218	10,406	1.1%	1.0%

Montgomery County, Maryland has an estimated population of 1,065,949, a less than 1% change from the 1,062,061 recorded in the 2020 Census. The population is 39.5% White, 21.0% Hispanic, 18.3% Black, 15.3% Asian, 4.8% Multiracial, and 1.1% Native American/Other. This demographic dot map shows the population of Montgomery County, with one dot drawn for each person counted by the Census, color-coded by race.

Montgomery has become slightly more racially diverse since the 2020 Census. It is considerably more 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 Montgomery County, that probability was 73.5% in 2020 and 74.1% in the most recent ACS estimates.

Montgomery County is ranked the most populous county in Maryland, out of 24 counties. Montgomery County was ranked the 1st most populous county in the 2020 Census.

Montgomery County's White Population

420,862 residents of Montgomery County, or 39.5% of the population, identify as White. The share of White residents in Montgomery County is lower than in Maryland overall, where 46.6% of the population is White. Montgomery County ranks 21st statewide in terms of White residents as a share of the population, out of 24 counties.

Since the 2020 Census, Montgomery County's White population has declined by an estimated 2.3%. White residents' share of Montgomery County's population has decreased from 40.6% to 39.5%.

Montgomery County is more White than neighboring District of Columbia County (36.5% White). Montgomery County is less White than neighboring Falls Church County (68% White), Arlington County (58% White), Howard County (45.9% White), and Fairfax County (51.1% White).

Montgomery County's Black Population

194,756 residents of Montgomery County, or 18.3% of the population, identify as Black. The share of Black residents in Montgomery County is considerably lower than in Maryland overall, where 28.9% of the population is Black. Montgomery County ranks 9th statewide in terms of Black residents as a share of the population, out of 24 counties.

Since the 2020 Census, Montgomery County's Black population has grown by an estimated 1.1%. Black residents' share of Montgomery County's population has remained roughly unchanged at 18.3%.

Montgomery County is more Black than neighboring Falls Church County (3.5% Black), Arlington County (9.3% Black), and Fairfax County (6.3% Black). Montgomery County is less Black than neighboring Howard County (19.7% Black), and District of Columbia County (41.6% Black).

Montgomery County's Asian Population

163,089 residents of Montgomery County, or 15.3% of the population, identify as Asian. The share of Asian residents in Montgomery County is higher than in Maryland overall, where 6.5% of the population is Asian. Montgomery County ranks 2nd statewide in terms of Asian residents as a share of the population, out of 24 counties.

Since the 2020 Census, Montgomery County's Asian population has remained roughly the same. Asian residents' share of Montgomery County's population has remained roughly unchanged at 15.3%.

Montgomery County is more Asian than neighboring Falls Church County (9.1% Asian), Arlington County (10.5% Asian), and District of Columbia County (4.3% Asian). Montgomery County is less Asian than neighboring Howard County (19.2% Asian), and Fairfax County (18.4% Asian).

Montgomery County's Hispanic Population

223,958 residents of Montgomery County, or 21.0% of the population, identify as Hispanic. The share of Hispanic residents in Montgomery County is higher than in Maryland overall, where 12.5% of the population is Hispanic. Montgomery County ranks 2nd statewide in terms of Hispanic residents as a share of the population, out of 24 counties.

Since the 2020 Census, Montgomery County's Hispanic population has grown by an estimated 3.0%. Hispanic residents' share of Montgomery County's population has increased from 20.5% to 21.0%.

Montgomery County is more Hispanic than neighboring Falls Church County (10.8% Hispanic), Arlington County (15.9% Hispanic), Howard County (8.7% Hispanic), District of Columbia County (11.9% Hispanic), and Fairfax County (18.9% Hispanic).

Montgomery County's Native American/Other Population

12,218 residents of Montgomery County, 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 Montgomery County is comparable to the share in Maryland overall, where 0.8% of the population is Native American/Other. Montgomery County ranks 2nd statewide in terms of Native American/Other residents as a share of the population, out of 24 counties.

Since the 2020 Census, Montgomery County's Native American/Other population has grown by an estimated 17.4%. Native American/Other residents' share of Montgomery County's population has remained roughly unchanged at 1.1%.

Montgomery County is more Native American/Other than neighboring Arlington County (0.8% Native American/Other), Howard County (0.8% Native American/Other), and District of Columbia County (0.8% Native American/Other). Montgomery County is less Native American/Other than neighboring Falls Church County (1.3% Native American/Other), and Fairfax County (1.2% Native American/Other).

Montgomery County's Multiracial Population

51,066 residents of Montgomery County, or 4.8% of the population, identify as Multiracial. The share of Multiracial residents in Montgomery County is comparable to the share in Maryland overall, where 4.6% of the population is Multiracial. Montgomery County ranks 11th statewide in terms of Multiracial residents as a share of the population, out of 24 counties.

Since the 2020 Census, Montgomery County's Multiracial population has grown by an estimated 6.2%. Multiracial residents' share of Montgomery County's population has remained roughly unchanged at 4.8%.

Montgomery County is more Multiracial than neighboring Fairfax County (4.1% Multiracial). Montgomery County is less Multiracial than neighboring Falls Church County (7.2% Multiracial), Arlington County (5.5% Multiracial), Howard County (5.7% Multiracial), and District of Columbia County (4.9% 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.