Carter Lake, Iowa demographics

Carter Lake, IA demographics: median age 40.0; 9.5% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Carter Lake city, Iowa · Incorporated city · GEOID 1911215. The survey estimates a population of 3,767 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Carter Lake is 40.0 years, with a 90% margin of error of 5.6 years. There are 1,390 households (±156). 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	40.0 ±5.6	38.6 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 3,767
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Under 18	974 ±247	25.9% ±6.5 pp	22.9%	22.0%
18–34	663 ±181	17.6% ±4.8 pp	22.5%	22.8%
35–64	1,480 ±276	39.3% ±7.3 pp	36.5%	38.0%
65 and older	650 ±154	17.3% ±4.1 pp	18.1%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 3,767
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Male	1,897 ±214	50.4% ±5.7 pp	50.2%	49.5%
Female	1,870 ±213	49.6% ±5.6 pp	49.8%	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: 3,767
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
White alone	3,015 ±425	80.0% ±11.3 pp	84.1%	61.0%
Black or African American alone	15 ±20 · low precision	0.4% ±0.5 pp · low precision	3.9%	12.2%
American Indian and Alaska Native alone	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.4%	0.9%
Asian alone	13 ±24 · low precision	0.3% ±0.6 pp · low precision	2.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.2%	0.2%
Some other race alone	110 ±106 · low precision	2.9% ±2.8 pp · low precision	2.4%	7.1%
Two or more races	614 ±421 · low precision	16.3% ±11.2 pp · low precision	6.6%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 3,767
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Not Hispanic or Latino	3,229 ±406	85.7% ±10.8 pp	92.7%	80.7%
Hispanic or Latino	538 ±408 · low precision	14.3% ±10.8 pp · low precision	7.3%	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: 1,390
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Married-couple family	717 ±140	51.6% ±8.2 pp	48.3%	46.9%
Other family: male householder, no spouse present	157 ±89 · low precision	11.3% ±6.3 pp · low precision	4.3%	5.1%
Other family: female householder, no spouse present	200 ±108 · low precision	14.4% ±7.6 pp · low precision	9.0%	12.2%
Nonfamily: householder living alone	287 ±124	20.6% ±8.6 pp	30.9%	28.7%
Nonfamily: householder not living alone	29 ±29 · low precision	2.1% ±2.1 pp · low precision	7.6%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 1,390
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Households with people under 18	512 ±103	36.8% ±6.1 pp	28.5%	29.5%
Households without people under 18	878 ±158	63.2% ±8.9 pp	71.5%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 1,390
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
One-person nonfamily households	287 ±124	20.6% ±8.6 pp	30.9%	28.7%
Two-person households	479 ±118	34.5% ±7.5 pp	36.3%	33.8%
Three-person households	332 ±108	23.9% ±7.3 pp	12.9%	15.3%
Four-person households	163 ±115 · low precision	11.7% ±8.2 pp · low precision	11.4%	12.6%
Five-person households	105 ±60 · low precision	7.6% ±4.2 pp · low precision	5.6%	5.9%
Six-person households	0 ±14 · low precision	0.0% ±1.0 pp · low precision	1.9%	2.2%
Seven or more people	24 ±35 · low precision	1.7% ±2.5 pp · low precision	1.0%	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: 3,767
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Native	3,531 ±140	93.7% ±3.7 pp	94.1%	85.9%
Foreign born	236 ±140 · low precision	6.3% ±3.7 pp · low precision	5.9%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 3,572
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
English only	3,030 ±392	84.8% ±10.8 pp	90.9%	77.7%
Spanish	519 ±365 · low precision	14.5% ±10.2 pp · low precision	4.7%	13.6%
French, Haitian, or Cajun	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.3%	0.7%
German or other West Germanic	10 ±17 · low precision	0.3% ±0.5 pp · low precision	0.6%	0.5%
Russian, Polish, or other Slavic	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.4%	0.7%
Other Indo-European	13 ±24 · low precision	0.4% ±0.7 pp · low precision	0.6%	2.0%
Korean	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.3%	1.1%
Vietnamese	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.3%	0.5%
Tagalog, including Filipino	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.1%	0.6%
Other Asian and Pacific Island	0 ±10 · low precision	0.0% ±0.3 pp · low precision	1.0%	1.1%
Arabic	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.3%	0.5%
Other and unspecified	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.6%	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: 2,539
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Less than high school graduate	246 ±136 · low precision	9.7% ±5.3 pp · low precision	6.7%	10.4%
High school graduate or equivalency	1,268 ±275	49.9% ±9.9 pp	30.0%	26.0%
Some college, no degree	507 ±136	20.0% ±5.1 pp	19.7%	19.1%
Associate’s degree	276 ±117	10.9% ±4.5 pp	12.1%	8.8%
Bachelor’s degree	107 ±63 · low precision	4.2% ±2.5 pp · low precision	20.9%	21.6%
Graduate or professional degree	135 ±86 · low precision	5.3% ±3.4 pp · low precision	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: 3,767
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Same house	3,683 ±100	97.8% ±2.6 pp	87.1%	87.7%
Moved within same county	84 ±99 · low precision	2.2% ±2.6 pp · low precision	6.7%	6.3%
Moved from a different county in the same state	0 ±10 · low precision	0.0% ±0.3 pp · low precision	3.7%	3.1%
Moved from a different state	0 ±10 · low precision	0.0% ±0.3 pp · low precision	2.2%	2.3%
Moved from abroad	0 ±10 · low precision	0.0% ±0.3 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

9.2% of Carter Lake residents (±4.2 percentage points) had no health insurance coverage when surveyed, compared with 5.0% in Iowa and 8.4% nationally. 89.1% 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	Carter Lake	Iowa	U.S.	Compared with Iowa
People without health insurance Civilian noninstitutionalized population	9.2% ±4.2 pp	5.0%	8.4%	Not statistically different
Households with a broadband subscription Households	89.1% ±7.9 pp	88.9%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	9.7% ±5.9 pp · low precision	6.5%	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 Carter Lake . 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 Carter Lake housing and cost context or return to the city profile.