Monongalia County's 2026 population is estimated at 110,593, reflecting a 0.86% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Monongalia County is the 3rd largest county in West Virginia. The 2010 population was 96,768 and has grown 14.29% since 2010.
Data after 2023 is projected based on recent change
Overall: 32.7 years
Female: 33.2 years
Male: 32.2 years
There are 89,898 adults, (14,370 of whom are seniors) in Monongalia County.
Female: 51,794 (48.3%)
Male: 55,369 (51.7%)
The racial composition of Monongalia County includes 86.84% White, 3.49% Asian, 3.25% Black or African American, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 93,057 | 86.84% |
| Two or more races | 5,557 | 5.19% |
| Asian | 3,738 | 3.49% |
| Black or African American | 3,486 | 3.25% |
| Other race | 1,226 | 1.14% |
| Native American | 98 | 0.09% |
| Native Hawaiian or Pacific Islander | 1 | 0% |
Monongalia County 's average per capita income is $55,079. Household income levels show a median of $65,346. The poverty rate stands at 19.71%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $130,958 | $161,463 |
| Families | $105,912 | $138,004 |
| Households | $65,346 | $97,594 |
| Non Families | $37,187 | $51,633 |
Average Income
Median Household Income
Poverty Rate