Madison County's 2026 population is estimated at 56,401, reflecting a 0.76% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Madison County is the 8th largest county in Idaho. The 2010 population was 37,588 and has grown 50.05% since 2010.
Data after 2023 is projected based on recent change
Overall: 21.4 years
Female: 20.4 years
Male: 22.5 years
There are 43,564 adults, (2,945 of whom are seniors) in Madison County.
Female: 29,894 (54.7%)
Male: 24,724 (45.3%)
The racial composition of Madison County includes 87.1% White, 3.68% other race, and smaller percentages for Asian, Black or African American, Native Hawaiian or Pacific Islander, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 47,573 | 87.1% |
| Two or more races | 3,373 | 6.18% |
| Other race | 2,010 | 3.68% |
| Asian | 816 | 1.49% |
| Black or African American | 555 | 1.02% |
| Native Hawaiian or Pacific Islander | 157 | 0.29% |
| Native American | 134 | 0.25% |
Madison County 's average per capita income is $39,752. Household income levels show a median of $60,160. The poverty rate stands at 24.48%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $70,011 | - |
| Families | $65,935 | $101,526 |
| Households | $60,160 | $90,919 |
| Non Families | $48,270 | $51,981 |
Average Income
Median Household Income
Poverty Rate
