Franklin County, Idaho
Located in Idaho, Franklin County has a population of 15,056 residents and a median age of 33.3 years, making it the #2,159 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 7.9%. The median home value is $372,600, and the median household income is $71,950, which is 4% below the national median.
Demographics
Franklin County has a population of 15,056, making it the #2,159 most populous county in the US. The median age is 33.3 years, which is 14.4% below the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Franklin County is $71,950, ranking #1,050 out of 3,222 counties — 4.3% below the national median. The poverty rate is 7.9% and unemployment stands at 2.4%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Franklin County is $372,600 (+32.2% vs national). Renters pay a median of $894/mo and the homeownership rate is 78.1%.
Median Home Value Trend
Rankings →Household Type
Education
In Franklin County, 23.9% of adults age 25+ hold a bachelor's degree or higher, which is 29.0% below the national average, ranking #1,379 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Franklin County is 78.9 years. 18.0% of adults report poor or fair health and 10.1% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
17.5% of adults in Franklin County smoke , 33.1% are obese , and 18.1% report excessive drinking.
Adult Smoking Trend
Safety
The suicide rate is 21.3 per 100,000. Motor vehicle deaths occur at a rate of 19.3 per 100,000.
Suicide Rate Trend
Families & Children
9.3% of children in Franklin County live in poverty . The teen birth rate is 11.4 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Franklin County is 72.9%. The mean commute time is 26.8 min, which is 2.8% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Franklin County voted Republican with a margin of 77.6%. The vote was 9.8% Dem / 87.4% Rep. Compared to 2020, the margin shifted +0.2 toward Democrats .
Vote Share Over Time
About Franklin County, Idaho
Franklin County, Idaho has a total population of 15,056, making it the 2,159th most populous county in the United States. The median age in Franklin County is 33.3 years, which is 14.4% below the national median of 38.9 years.
The median household income in Franklin County is $71,950, which ranks #1,050 of 3,222 counties nationwide. This is 4.3% below the national median of $75,149. The poverty rate is 7.9%, lower than the national rate of 12.6%. The unemployment rate stands at 2.4%.
The median home value in Franklin County is $372,600, 32.2% above the national median. Renters in Franklin County pay a median gross rent of $894 per month. The homeownership rate is 78.1%, compared to the national rate of 64.4%.
In Franklin County, 23.9% of residents aged 25 and older hold a bachelor's degree or higher, 29.0% below the national average of 33.7%. Health insurance coverage stands at 91.6% of the population. The average commute time for workers is 26.8 min.
Franklin County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 89.4% of the population, followed by Hispanic or Latino (7.4%) and Two or More Races (2.4%).
All data for Franklin County, Idaho comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.