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 Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
White
Other race
Two or more races
Native American
Black or African American
Asian
Native Hawaiian or Pacific Islander
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% |
| Black or African American | 0 | 0% |
| Asian | 0 | 0% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
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