Idaho Falls, Idaho demographics

Idaho Falls, ID demographics: median age 33.7; 31.7% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Idaho Falls city, Idaho · Incorporated city · GEOID 1639700. The survey estimates a population of 67,725 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Idaho Falls is 33.7 years, with a 90% margin of error of 0.8 years. There are 24,728 households (±522). Age and household distributions show how these totals are composed; they do not establish which neighborhood suits a particular person.

Every count and share is an estimate. “±” is a 90% margin of error (MOE); pp means percentage points. Derived shares use the category count divided by the named universe. Aggregated category MOEs and percentage MOEs are approximate. A margin larger than half its estimate is flagged as low precision. Blank source uncertainty is shown as unavailable, never zero.

Age distribution and sex

City, state and U.S. estimates · ACS 2020–2024
Measure / survey universe	City estimate ± MOE	State estimate ± MOE	U.S. estimate ± MOE
Median age Total population · years	33.7 ±0.8	37.3 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 67,725
Category	Count ± MOE	Share ± MOE (pp)	Idaho	U.S.
Under 18	18,842 ±886	27.8% ±1.3 pp	24.1%	22.0%
18–34	16,313 ±807	24.1% ±1.2 pp	22.8%	22.8%
35–64	23,371 ±975	34.5% ±1.4 pp	36.1%	38.0%
65 and older	9,199 ±636	13.6% ±0.9 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 67,725
Category	Count ± MOE	Share ± MOE (pp)	Idaho	U.S.
Male	33,572 ±597	49.6% ±0.9 pp	50.3%	49.5%
Female	34,153 ±606	50.4% ±0.9 pp	49.7%	50.5%

The age groups are mutually exclusive and cover the entire population. The sex categories follow this ACS table’s published classification; they are not a survey of gender identity.

Race and Hispanic origin

Race · B02001 · ACS 2020–2024 Total population: 67,725
Category	Count ± MOE	Share ± MOE (pp)	Idaho	U.S.
White alone	56,062 ±946	82.8% ±1.4 pp	81.7%	61.0%
Black or African American alone	328 ±140	0.5% ±0.2 pp	0.8%	12.2%
American Indian and Alaska Native alone	686 ±260	1.0% ±0.4 pp	1.2%	0.9%
Asian alone	444 ±163	0.7% ±0.2 pp	1.4%	6.0%
Native Hawaiian and Other Pacific Islander alone	184 ±103 · low precision	0.3% ±0.2 pp · low precision	0.2%	0.2%
Some other race alone	3,972 ±1,003	5.9% ±1.5 pp	5.1%	7.1%
Two or more races	6,049 ±630	8.9% ±0.9 pp	9.7%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 67,725
Category	Count ± MOE	Share ± MOE (pp)	Idaho	U.S.
Not Hispanic or Latino	56,439 ±801	83.3% ±1.2 pp	86.4%	80.7%
Hispanic or Latino	11,286 ±795	16.7% ±1.2 pp	13.6%	19.3%

Hispanic origin and race are separate questions. People of Hispanic or Latino origin may be of any race and appear in both tables. Do not add the Hispanic share to race shares. Race alone and two-or-more-race groups are the mutually exclusive categories of the race table.

Household types, children and living alone

Household types · B11001 · ACS 2020–2024 Households: 24,728
Category	Count ± MOE	Share ± MOE (pp)	Idaho	U.S.
Married-couple family	11,865 ±537	48.0% ±1.9 pp	55.1%	46.9%
Other family: male householder, no spouse present	1,003 ±237	4.1% ±1.0 pp	4.7%	5.1%
Other family: female householder, no spouse present	3,003 ±453	12.1% ±1.8 pp	8.7%	12.2%
Nonfamily: householder living alone	7,057 ±569	28.5% ±2.2 pp	24.4%	28.7%
Nonfamily: householder not living alone	1,800 ±271	7.3% ±1.1 pp	7.1%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 24,728
Category	Count ± MOE	Share ± MOE (pp)	Idaho	U.S.
Households with people under 18	8,654 ±442	35.0% ±1.6 pp	31.9%	29.5%
Households without people under 18	16,074 ±678	65.0% ±2.4 pp	68.1%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 24,728
Category	Count ± MOE	Share ± MOE (pp)	Idaho	U.S.
One-person nonfamily households	7,057 ±569	28.5% ±2.2 pp	24.4%	28.7%
Two-person households	7,619 ±590	30.8% ±2.3 pp	37.0%	33.8%
Three-person households	3,871 ±435	15.7% ±1.7 pp	14.5%	15.3%
Four-person households	2,420 ±352	9.8% ±1.4 pp	12.2%	12.6%
Five-person households	2,277 ±375	9.2% ±1.5 pp	6.6%	5.9%
Six-person households	931 ±184	3.8% ±0.7 pp	3.3%	2.2%
Seven or more people	553 ±158	2.2% ±0.6 pp	2.1%	1.4%

A family household contains related people under the Census definition. A nonfamily household can contain one person or unrelated people sharing a home. Households with children can also appear in the household-type and size tables, so those tables must not be added together. Household estimates exclude people living in group quarters from the household universe.

Nativity and languages spoken at home

Nativity · B05002 · ACS 2020–2024 Total population: 67,725
Category	Count ± MOE	Share ± MOE (pp)	Idaho	U.S.
Native	64,895 ±381	95.8% ±0.6 pp	94.1%	85.9%
Foreign born	2,830 ±377	4.2% ±0.6 pp	5.9%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 63,091
Category	Count ± MOE	Share ± MOE (pp)	Idaho	U.S.
English only	56,599 ±745	89.7% ±1.1 pp	89.0%	77.7%
Spanish	5,726 ±572	9.1% ±0.9 pp	8.1%	13.6%
French, Haitian, or Cajun	146 ±116 · low precision	0.2% ±0.2 pp · low precision	0.2%	0.7%
German or other West Germanic	113 ±78 · low precision	0.2% ±0.1 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	39 ±50 · low precision	0.1% ±0.1 pp · low precision	0.5%	0.7%
Other Indo-European	124 ±67 · low precision	0.2% ±0.1 pp · low precision	0.5%	2.0%
Korean	37 ±45 · low precision	0.1% ±0.1 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	94 ±83 · low precision	0.1% ±0.1 pp · low precision	0.2%	1.1%
Vietnamese	0 ±29 · low precision	0.0% ±0.0 pp · low precision	0.1%	0.5%
Tagalog, including Filipino	23 ±46 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.6%
Other Asian and Pacific Island	118 ±118 · low precision	0.2% ±0.2 pp · low precision	0.4%	1.1%
Arabic	4 ±6 · low precision	0.0% ±0.0 pp · low precision	0.1%	0.5%
Other and unspecified	68 ±64 · low precision	0.1% ±0.1 pp · low precision	0.3%	0.8%

Foreign born means not a U.S. citizen at birth; it includes naturalized citizens. Language categories describe speech at home among people age five and older. A language other than English at home does not establish that someone cannot speak English. This city page uses the published C16001 summary categories because the more detailed B16001 table does not provide these city records in this release.

Educational attainment

Highest completed education · B15003 · ACS 2020–2024 Population age 25 and older: 42,792
Category	Count ± MOE	Share ± MOE (pp)	Idaho	U.S.
Less than high school graduate	4,012 ±594	9.4% ±1.4 pp	8.1%	10.4%
High school graduate or equivalency	10,449 ±770	24.4% ±1.7 pp	26.1%	26.0%
Some college, no degree	10,389 ±781	24.3% ±1.8 pp	24.2%	19.1%
Associate’s degree	4,382 ±592	10.2% ±1.4 pp	9.7%	8.8%
Bachelor’s degree	9,436 ±611	22.1% ±1.4 pp	21.3%	21.6%
Graduate or professional degree	4,124 ±447	9.6% ±1.0 pp	10.5%	14.1%

The denominator excludes residents under 25. Each person is counted in the highest attainment category they completed. This table does not measure the quality of local schools or the education level of every current student.

Residence one year earlier

Geographic mobility · B07003 · ACS 2020–2024 Population age 1 and older: 66,623
Category	Count ± MOE	Share ± MOE (pp)	Idaho	U.S.
Same house	57,166 ±1,024	85.8% ±1.5 pp	84.9%	87.7%
Moved within same county	5,741 ±1,043	8.6% ±1.6 pp	7.0%	6.3%
Moved from a different county in the same state	1,776 ±512	2.7% ±0.8 pp	3.1%	3.1%
Moved from a different state	1,785 ±434	2.7% ±0.7 pp	4.6%	2.3%
Moved from abroad	155 ±109 · low precision	0.2% ±0.2 pp · low precision	0.4%	0.6%

These are respondents’ residence patterns one year before their survey response, pooled across the five-year window. They are not a net migration count for 2025. A person can move to a different house within the same city or county; moves within the same county should not automatically be interpreted as new arrivals to the city.

Health insurance, internet access and veterans

8.7% of Idaho Falls residents (±1.0 percentage points) had no health insurance coverage when surveyed, compared with 9.1% in Idaho and 8.4% nationally. 92.6% of households subscribe to broadband of any type, including cellular data plans. A subscription is not the same as available service: the FCC National Broadband Map shows providers at a specific address.

City, state and U.S. shares · ACS 2020–2024
Measure	Idaho Falls	Idaho	U.S.	Compared with Idaho
People without health insurance Civilian noninstitutionalized population	8.7% ±1.0 pp	9.1%	8.4%	Not statistically different
Households with a broadband subscription Households	92.6% ±0.7 pp	91.9%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	7.8% ±0.9 pp	8.0%	6.2%	Not statistically different

Reading and reusing the estimates

The Census table links above lead to the original detailed tables. Counts, source universes and uncertainty are retained in the source observation download for Idaho Falls . Compare these figures with the same survey window; do not compare one city’s five-year estimate with another city’s annual estimate as though they measured the same period. For methods, see uncertainty and denominator calculations.

Read Idaho Falls housing and cost context or return to the city profile.