Monongalia County Demographics

A map of Monongalia County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	91,918	88,959	85.8%	84.1%
Multiracial	3,962	5,166	3.7%	4.9%
Asian	3,738	3,729	3.5%	3.5%
Hispanic	3,397	3,308	3.2%	3.1%
Black	3,334	4,068	3.1%	3.8%
Native American/Other	814	592	0.8%	0.6%

Monongalia County, West Virginia has an estimated population of 107,163, a slight increase from the 105,822 recorded in the 2020 Census. The population is 85.8% White, 3.7% Multiracial, 3.5% Asian, 3.2% Hispanic, 3.1% Black, and 0.8% Native American/Other. This demographic dot map shows the population of Monongalia County, with one dot drawn for each person counted by the Census, color-coded by race.

Monongalia has become less racially diverse since the 2020 Census. It is considerably more diverse than West Virginia overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Monongalia County, that probability was 28.7% in 2020 and 26.0% in the most recent ACS estimates.

Monongalia County is ranked the 3rd most populous county in West Virginia, out of 55 counties. Monongalia County was ranked the 3rd most populous county in the 2020 Census.

Monongalia County's White Population

91,918 residents of Monongalia County, or 85.8% of the population, identify as White. The share of White residents in Monongalia County is slightly lower than in West Virginia overall, where 89.7% of the population is White. Monongalia County ranks 51st statewide in terms of White residents as a share of the population, out of 55 counties.

Since the 2020 Census, Monongalia County's White population has grown by an estimated 3.3%. White residents' share of Monongalia County's population has increased from 84.1% to 85.8%.

Monongalia County is less White than neighboring Marion County (91% White), Greene County (91.1% White), Taylor County (94.9% White), Preston County (87.3% White), and Harrison County (91.8% White).

Monongalia County's Black Population

3,334 residents of Monongalia County, or 3.1% of the population, identify as Black. The share of Black residents in Monongalia County is comparable to the share in West Virginia overall, where 3.1% of the population is Black. Monongalia County ranks 12th statewide in terms of Black residents as a share of the population, out of 55 counties.

Since the 2020 Census, Monongalia County's Black population has declined by an estimated 18.0%. Black residents' share of Monongalia County's population has decreased from 3.8% to 3.1%.

Monongalia County is more Black than neighboring Marion County (2.5% Black), Greene County (2.7% Black), Taylor County (0.6% Black), and Harrison County (1.5% Black). Monongalia County is less Black than neighboring Preston County (6.5% Black).

Monongalia County's Asian Population

3,738 residents of Monongalia County, or 3.5% of the population, identify as Asian. The share of Asian residents in Monongalia County is slightly higher than in West Virginia overall, where 0.8% of the population is Asian. Monongalia County ranks 1st statewide in terms of Asian residents as a share of the population, out of 55 counties.

Since the 2020 Census, Monongalia County's Asian population has remained roughly the same. Asian residents' share of Monongalia County's population has remained roughly unchanged at 3.5%.

Monongalia County is more Asian than neighboring Marion County (0.6% Asian), Greene County (0.2% Asian), Taylor County (0% Asian), Preston County (0.4% Asian), and Harrison County (0.8% Asian).

Monongalia County's Hispanic Population

3,397 residents of Monongalia County, or 3.2% of the population, identify as Hispanic. The share of Hispanic residents in Monongalia County is comparable to the share in West Virginia overall, where 2.1% of the population is Hispanic. Monongalia County ranks 5th statewide in terms of Hispanic residents as a share of the population, out of 55 counties.

Since the 2020 Census, Monongalia County's Hispanic population has grown by an estimated 2.7%. Hispanic residents' share of Monongalia County's population has remained roughly unchanged at 3.2%.

Monongalia County is more Hispanic than neighboring Marion County (1.6% Hispanic), Greene County (1.6% Hispanic), Taylor County (1% Hispanic), Preston County (1.9% Hispanic), and Harrison County (2.3% Hispanic).

Monongalia County's Native American/Other Population

814 residents of Monongalia County, or 0.8% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Monongalia County is comparable to the share in West Virginia overall, where 0.4% of the population is Native American/Other. Monongalia County ranks 5th statewide in terms of Native American/Other residents as a share of the population, out of 55 counties.

Since the 2020 Census, Monongalia County's Native American/Other population has grown by an estimated 37.5%. Native American/Other residents' share of Monongalia County's population has remained roughly unchanged at 0.8%.

Monongalia County is more Native American/Other than neighboring Marion County (0.3% Native American/Other), Greene County (0.3% Native American/Other), Taylor County (0.1% Native American/Other), Preston County (0.5% Native American/Other), and Harrison County (0.1% Native American/Other).

Monongalia County's Multiracial Population

3,962 residents of Monongalia County, or 3.7% of the population, identify as Multiracial. The share of Multiracial residents in Monongalia County is comparable to the share in West Virginia overall, where 3.9% of the population is Multiracial. Monongalia County ranks 3rd statewide in terms of Multiracial residents as a share of the population, out of 55 counties.

Since the 2020 Census, Monongalia County's Multiracial population has declined by an estimated 23.3%. Multiracial residents' share of Monongalia County's population has decreased from 4.9% to 3.7%.

Monongalia County is more Multiracial than neighboring Taylor County (3.3% Multiracial), Preston County (3.5% Multiracial), and Harrison County (3.5% Multiracial). Monongalia County is less Multiracial than neighboring Marion County (3.9% Multiracial), and Greene County (4.1% 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.