Twin Falls County, Idaho Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Twin Falls County, ID Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
-
B
Health Around average
-
C
Income Below averageWealthier than 72% of counties in Idaho
-
D
Education Well below average
Source: Map AI Methodology
Population: density and quick facts
| Metric | Twin Falls County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Population | 89,838 | 1,929,983 | 337,468,954 |
| Population density (per sq mi) | 46.6 | 23.1 | 86.4 |
| Population growth (%/yr) | 1.92% | 2.12% | 0.59% |
| Median age | 37.5 | 38.7 | 37.3 |
| Households | 34,754 | 712,816 | 130,235,071 |
Population in Twin Falls County grew by 23.8% from 2009 to 2024, reaching 89,838 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Twin Falls County is Gen Z, aged 13–28, at 22.0% of residents. That is 0.9 points below Idaho as a whole.
- Gen Z 13–28 19,751 22.0% -0.9 pts
- Millennials 29–44 18,937 21.1% +0.3 pts
- Gen X 45–60 16,026 17.8% -1.4 pts
- Boomers 61–79 14,534 16.2% +0.2 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Idaho, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 50.5% of the people living in Twin Falls County and men 49.5%.
- Women 50.5% Idaho 49.6%
- Men 49.5% Idaho 50.4%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Twin Falls County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Twin Falls County has a the economy index of C, which means it is somewhat prosperous.
| Metric | Twin Falls County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median household income | $68,126 | $78,141 | $80,455 |
| Income growth (%/yr) | 5.19% | 5.97% | 4.80% |
| Unemployment rate | 3.0% | 3.7% | 5.2% |
The median household income in Twin Falls County is about 13% lower than in Idaho.
Housing
| Metric | Twin Falls County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median home price | $185,795 | $394,140 | $248,835 |
| Median rent | $1,089 | $1,236 | $1,407 |
| Homeownership rate | 72.9% | 72.3% | 65.2% |
The median home price in Twin Falls County is about 14.2 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,089 per month for that long.
Commute Time & Mobility
Commuters in Twin Falls County spend about 31 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 129 hours, about 5.4 full days, spent commuting.
| Metric | Twin Falls County | Idaho Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 15.5 | 18.0 | 22.4 |
| Round-trip commute (min) | 31.0 | 35.9 | 44.8 |
| Yearly time spent (hours) | 129 | 150 | 187 |
| Estimated yearly cost | $4,006 | $4,641 | $5,790 |
| Work from home | 7.4% | 13.3% | 15.0% |
| Highway traffic (vehicles/day) | 5,172 | 4,714 | 8,813 |
| Local road traffic (vehicles/day) | 851 | 865 | 1,355 |
Fastest commutes among counties in
Idaho:
Custer County (8.9 min), Lemhi County (11.6 min), Madison County (12.0 min).
Slowest:
Camas County (49.5 min), Boise County (38.0 min), Lincoln County (32.0 min).
The average commute time in Twin Falls County is 16 minutes, shorter than the 18 minutes in Idaho.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Twin Falls County has a education index of D, which means it is barely educated.
| Metric | Twin Falls County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 21.3% | 27.1% | 31.6% |
| Average household size | 2.65 | 2.64 | 2.53 |
Highest education index among counties in
Idaho:
Latah County (0.4), Teton County (0.3), Ada County (0.3).
Lowest:
Clark County (0.1), Owyhee County (0.2), Lincoln County (0.2).
Health
Twin Falls County has a health index of B, which means it is quite healthy.
| Metric | Twin Falls County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 78.0 | 79.5 | 78.3 |
| Self-rated poor health | 14.1% | 15.6% | 16.3% |
| Smokers | 17.0% | 17.6% | 19.0% |
Highest health index among counties in
Idaho:
Madison County (0.8), Latah County (0.8), Ada County (0.8).
Lowest:
Shoshone County (0.8), Washington County (0.8), Lincoln County (0.8).
Twin Falls County, ID Compared With Nearby Counties
How Twin Falls County, ID compares with the 2 counties closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Twin Falls County, ID | 89,838 | $68,126 #3/3 | $185,795 #2/3 | 15.5 min #2/3 |
| Jerome County, ID | 25,173 | $71,652 | $275,000 | 18.1 min |
| Cassia County, ID | 25,479 | $71,744 | $179,861 | 13.9 min |
Frequently Asked Questions
Common questions about Twin Falls County, Idaho.
How big is Twin Falls County, Idaho by population?
About 89,838 people live in Twin Falls County, Idaho, in 34,754 households of 2.7 people on average. The median age is 37.5, close to the U.S. median of 37.3.
How densely populated is Twin Falls County, Idaho?
Averaged over its land area, Twin Falls County, Idaho has 47 people per square mile, a density typical of rural areas. That is about 54% of the U.S. average of 86.
Is Twin Falls County, Idaho an affordable place to live?
The median home costs 2.7 times the median household income ($185,795 against $68,126), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $1,089 a month takes about 19% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How strong is the job market in Twin Falls County, Idaho?
Unemployment in Twin Falls County, Idaho is only 3.0%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
What share of adults in Twin Falls County, Idaho have a college degree?
21.3% of adults in Twin Falls County, Idaho hold a bachelor's degree or higher (about 1 in 5), well below the U.S. share of 31.6%.
Analyze any area in the US
Get local demographics for any address, aggregated by drive time or radius, on the interactive map.
Explore the map →