McHenry County's 2026 population is estimated at 5,101, reflecting a -0.33% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). McHenry County is the 23rd largest county in North Dakota. The 2010 population was 5,402 and has grown -5.57% since 2010.
Data after 2023 is projected based on recent change
Overall: 43.4 years
Female: 43.8 years
Male: 43.4 years
There are 3,947 adults, (1,153 of whom are seniors) in McHenry County.
Female: 2,508 (48.2%)
Male: 2,699 (51.8%)
The racial composition of McHenry County includes 94.26% White, and smaller percentages for Black or African American, Native American, other race, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 4,908 | 94.26% |
| Two or more races | 168 | 3.23% |
| Black or African American | 40 | 0.77% |
| Native American | 40 | 0.77% |
| Other race | 39 | 0.75% |
| Asian | 12 | 0.23% |
McHenry County 's average per capita income is $49,381. Household income levels show a median of $80,733. The poverty rate stands at 9.69%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $105,977 | - |
| Families | $98,060 | $108,948 |
| Households | $80,733 | $92,720 |
| Non Families | $40,529 | $58,801 |
Average Income
Median Household Income
Poverty Rate