Marengo County's 2026 population is estimated at 18,126, reflecting a -1.05% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Marengo County is the 48th largest county in Alabama. The 2010 population was 20,955 and has grown -13.5% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.4 years
Female: 44.1 years
Male: 39.4 years
There are 14,697 adults, (3,885 of whom are seniors) in Marengo County.
Female: 9,920 (52.6%)
Male: 8,931 (47.4%)
The racial composition of Marengo County includes 50.88% Black or African American, 44.49% White, and smaller percentages for other race, Native American, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Black or African American | 9,592 | 50.88% |
| White | 8,386 | 44.49% |
| Two or more races | 596 | 3.16% |
| Other race | 174 | 0.92% |
| Native American | 54 | 0.29% |
| Asian | 49 | 0.26% |
Marengo County 's average per capita income is $44,414. Household income levels show a median of $43,825. The poverty rate stands at 21.85%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $100,573 | - |
| Families | $79,569 | $98,328 |
| Households | $43,825 | $70,748 |
| Non Families | $19,111 | $34,728 |
Average Income
Median Household Income
Poverty Rate
