Le Mars, Iowa demographics

Le Mars, IA demographics: median age 39.0; 21.1% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Le Mars city, Iowa · Incorporated city · GEOID 1944400. The survey estimates a population of 10,640 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Le Mars is 39.0 years, with a 90% margin of error of 3.3 years. There are 4,342 households (±208). 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	39.0 ±3.3	38.6 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 10,640
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Under 18	2,676 ±316	25.2% ±3.0 pp	22.9%	22.0%
18–34	2,360 ±272	22.2% ±2.6 pp	22.5%	22.8%
35–64	3,686 ±392	34.6% ±3.7 pp	36.5%	38.0%
65 and older	1,918 ±285	18.0% ±2.7 pp	18.1%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 10,640
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Male	5,203 ±202	48.9% ±1.9 pp	50.2%	49.5%
Female	5,437 ±205	51.1% ±1.9 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: 10,640
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
White alone	8,851 ±260	83.2% ±2.4 pp	84.1%	61.0%
Black or African American alone	590 ±82	5.5% ±0.8 pp	3.9%	12.2%
American Indian and Alaska Native alone	5 ±9 · low precision	0.0% ±0.1 pp · low precision	0.4%	0.9%
Asian alone	5 ±19 · low precision	0.0% ±0.2 pp · low precision	2.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	71 ±87 · low precision	0.7% ±0.8 pp · low precision	0.2%	0.2%
Some other race alone	482 ±276 · low precision	4.5% ±2.6 pp · low precision	2.4%	7.1%
Two or more races	636 ±199	6.0% ±1.9 pp	6.6%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 10,640
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Not Hispanic or Latino	9,489 ±154	89.2% ±1.4 pp	92.7%	80.7%
Hispanic or Latino	1,151 ±153	10.8% ±1.4 pp	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: 4,342
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Married-couple family	2,160 ±229	49.7% ±4.7 pp	48.3%	46.9%
Other family: male householder, no spouse present	156 ±91 · low precision	3.6% ±2.1 pp · low precision	4.3%	5.1%
Other family: female householder, no spouse present	501 ±136	11.5% ±3.1 pp	9.0%	12.2%
Nonfamily: householder living alone	1,401 ±276	32.3% ±6.2 pp	30.9%	28.7%
Nonfamily: householder not living alone	124 ±92 · low precision	2.9% ±2.1 pp · low precision	7.6%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 4,342
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Households with people under 18	1,373 ±192	31.6% ±4.2 pp	28.5%	29.5%
Households without people under 18	2,969 ±310	68.4% ±6.3 pp	71.5%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 4,342
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
One-person nonfamily households	1,401 ±276	32.3% ±6.2 pp	30.9%	28.7%
Two-person households	1,402 ±230	32.3% ±5.1 pp	36.3%	33.8%
Three-person households	574 ±157	13.2% ±3.6 pp	12.9%	15.3%
Four-person households	545 ±118	12.6% ±2.7 pp	11.4%	12.6%
Five-person households	282 ±129	6.5% ±3.0 pp	5.6%	5.9%
Six-person households	123 ±84 · low precision	2.8% ±1.9 pp · low precision	1.9%	2.2%
Seven or more people	15 ±27 · low precision	0.3% ±0.6 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: 10,640
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Native	9,952 ±233	93.5% ±2.2 pp	94.1%	85.9%
Foreign born	688 ±235	6.5% ±2.2 pp	5.9%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 9,999
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
English only	8,801 ±324	88.0% ±3.0 pp	90.9%	77.7%
Spanish	733 ±190	7.3% ±1.9 pp	4.7%	13.6%
French, Haitian, or Cajun	9 ±16 · low precision	0.1% ±0.2 pp · low precision	0.3%	0.7%
German or other West Germanic	11 ±21 · low precision	0.1% ±0.2 pp · low precision	0.6%	0.5%
Russian, Polish, or other Slavic	0 ±16 · low precision	0.0% ±0.2 pp · low precision	0.4%	0.7%
Other Indo-European	48 ±78 · low precision	0.5% ±0.8 pp · low precision	0.6%	2.0%
Korean	0 ±16 · low precision	0.0% ±0.2 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	0 ±16 · low precision	0.0% ±0.2 pp · low precision	0.3%	1.1%
Vietnamese	0 ±16 · low precision	0.0% ±0.2 pp · low precision	0.3%	0.5%
Tagalog, including Filipino	5 ±19 · low precision	0.1% ±0.2 pp · low precision	0.1%	0.6%
Other Asian and Pacific Island	48 ±59 · low precision	0.5% ±0.6 pp · low precision	1.0%	1.1%
Arabic	0 ±16 · low precision	0.0% ±0.2 pp · low precision	0.3%	0.5%
Other and unspecified	344 ±213 · low precision	3.4% ±2.1 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: 7,070
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Less than high school graduate	416 ±174	5.9% ±2.5 pp	6.7%	10.4%
High school graduate or equivalency	2,649 ±336	37.5% ±4.6 pp	30.0%	26.0%
Some college, no degree	1,518 ±273	21.5% ±3.8 pp	19.7%	19.1%
Associate’s degree	998 ±214	14.1% ±3.0 pp	12.1%	8.8%
Bachelor’s degree	1,174 ±247	16.6% ±3.4 pp	20.9%	21.6%
Graduate or professional degree	315 ±130	4.5% ±1.8 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: 10,591
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Same house	9,571 ±344	90.4% ±3.2 pp	87.1%	87.7%
Moved within same county	617 ±302	5.8% ±2.9 pp	6.7%	6.3%
Moved from a different county in the same state	223 ±115 · low precision	2.1% ±1.1 pp · low precision	3.7%	3.1%
Moved from a different state	180 ±106 · low precision	1.7% ±1.0 pp · low precision	2.2%	2.3%
Moved from abroad	0 ±16 · low precision	0.0% ±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

6.3% of Le Mars residents (±2.5 percentage points) had no health insurance coverage when surveyed, compared with 5.0% in Iowa and 8.4% nationally. 90.8% 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	Le Mars	Iowa	U.S.	Compared with Iowa
People without health insurance Civilian noninstitutionalized population	6.3% ±2.5 pp	5.0%	8.4%	Not statistically different
Households with a broadband subscription Households	90.8% ±3.4 pp	88.9%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	5.5% ±1.8 pp	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 Le Mars . 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 Le Mars housing and cost context or return to the city profile.