Firth is a city located in Bingham County, Idaho. Firth has a 2025 population of 555. Firth is currently growing at a rate of 1.28% annually and its population has increased by 6.73% since the most recent census, which recorded a population of 520 in 2020.
The average household income in Firth is $65,679 with a poverty rate of 12.07%.The median age in Firth is 37.4 years: 41 years for males, and 33.7 years for females.
Data after 2023 is projected based on recent change
The racial composition of Firth includes 78.74% White, 9.45% other race, 4.99% Native American, and smaller percentages for and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 300 | 78.74% |
| Other race | 36 | 9.45% |
| Two or more races | 26 | 6.82% |
| Native American | 19 | 4.99% |
Married
Widowed
Divorced
Separated
Never Married
Firth's average per capita income is $42,279. Household income levels show a median of $49,167. The poverty rate stands at 12.07%.
Name | Median | Mean |
|---|---|---|
| Married Families | $90,313 | - |
| Families | $66,250 | $83,418 |
| Households | $49,167 | $65,679 |
| Non Families | $18,333 | $19,488 |
Average Income
Median Household Income
Poverty Rate