Firth, Idaho Demographics & Population 2026
During the 2020–2024 ACS period, Firth, Idaho had a total population of 429, the 154th largest city in Idaho, with a median household income of $56,250, which is 28% lower than the state average. The poverty rate is 12.1%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Firth Quick Facts
How Firth Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 381 | 429 | +12.6% |
| Median household income | $49,167 | $56,250 | +14.4% |
| Median home value | $197,900 | $235,400 | +18.9% |
How Firth Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 36 | National average: 61
Education
Educational Attainment (Adults 25+)
Firth Rankings in Idaho
Explore Idaho Rankings
Other Cities in Bingham County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Blackfoot | 12,782 | $64,032 | 10.6% | $262,500 |
| Shelley | 5,092 | $77,563 | 10.8% | $295,200 |
| Aberdeen | 2,564 | $82,619 | 14.2% | $174,500 |
| Groveland | 1,422 | $76,094 | 2.0% | $359,600 |
| Moreland | 1,326 | $60,682 | 19.7% | $248,500 |
| Riverside | 867 | $105,625 | 0.0% | $279,000 |
| Basalt | 569 | $78,472 | 1.4% | $306,600 |
| Rockford | 492 | $111,583 | 26.8% | $370,400 |
Cities Similar to Firth
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Oldtown | 428 | $57,833 | $261,700 | 21.9% | 18.0% |
| Garden Valley | 438 | N/A | $782,100 | 47.9% | 11.2% |
| Laclede | 406 | $51,140 | $272,800 | 9.5% | 0.0% |
| Culdesac | 411 | $49,167 | $160,400 | 12.8% | 32.7% |
| Grand View | 472 | $58,092 | $173,900 | 5.7% | 20.8% |
A note before these figures: with a population of 429, Firth's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Firth is a small community located in Idaho, within Bingham County. The total population is 429. It ranks as the 154th most populous out of 232 Census-designated places in Idaho.
Age Demographics
The median age in Firth is 37.2 years. This is about the same as the state median of 37.3 years. With 28.4% of the population under 18, Firth has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in Firth is $56,250. This is 28% lower than the state median of $77,800. It is also 30% lower than the national median of $80,734. The poverty rate stands at 12.1%. This is 14% higher than the state poverty rate of 10.6%. The survey records no unemployed residents in Firth, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $235,400. Housing costs are 44% lower than the state median of $418,600. The home-value-to-income ratio is 4.2x. 61.5% of occupied housing units are owner-occupied. This homeownership rate is 15% lower than the state average of 72.1%.
Race & Ethnicity
The largest racial or ethnic group in Firth is White (non-Hispanic), making up 82.0% of the population. Hispanic or Latino residents account for 14.7%.
Education
20.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 35% lower than the state rate of 31.8%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 85.9%.
Data Sources & Methodology
All demographic data for Firth, Idaho is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Idaho state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 232 Census-designated places in Idaho. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Firth, Idaho?
Firth, Idaho has a population of 429 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Firth, ID?
The median household income in Firth is $56,250, which is 30% lower than the national median of $80,734.
What is the poverty rate in Firth, ID?
The poverty rate in Firth is 12.1%. This means approximately 52 residents live below the federal poverty line.
What is the racial makeup of Firth, Idaho?
Firth's population is 82.0% White, 0.0% Black, 14.7% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Firth, ID?
The median home value in Firth is $235,400. The home-value-to-income ratio is 4.2x.
How educated is Firth, Idaho?
20.6% of adults (25+) in Firth hold a bachelor's degree or higher, and 5.1% hold a graduate or professional degree.