Eldorado, Illinois demographics

Eldorado, IL demographics: median age 46.6; 16.6% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Eldorado city, Illinois · Incorporated city · GEOID 1723009. The survey estimates a population of 3,771 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Eldorado is 46.6 years, with a 90% margin of error of 7.4 years. There are 1,898 households (±183). 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	46.6 ±7.4	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 3,771
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	665 ±144	17.6% ±3.6 pp	21.8%	22.0%
18–34	691 ±189	18.3% ±4.9 pp	22.7%	22.8%
35–64	1,530 ±256	40.6% ±6.3 pp	38.5%	38.0%
65 and older	885 ±164	23.5% ±4.1 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 3,771
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	1,888 ±215	50.1% ±4.7 pp	49.4%	49.5%
Female	1,883 ±182	49.9% ±3.5 pp	50.6%	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: 3,771
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	3,425 ±265	90.8% ±3.7 pp	61.0%	61.0%
Black or African American alone	12 ±34 · low precision	0.3% ±0.9 pp · low precision	13.6%	12.2%
American Indian and Alaska Native alone	6 ±10 · low precision	0.2% ±0.3 pp · low precision	0.6%	0.9%
Asian alone	62 ±47 · low precision	1.6% ±1.2 pp · low precision	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±13 · low precision	0.0% ±0.3 pp · low precision	0.0%	0.2%
Some other race alone	23 ±27 · low precision	0.6% ±0.7 pp · low precision	7.9%	7.1%
Two or more races	243 ±125 · low precision	6.4% ±3.3 pp · low precision	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 3,771
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	3,585 ±261	95.1% ±3.0 pp	81.2%	80.7%
Hispanic or Latino	186 ±102 · low precision	4.9% ±2.7 pp · low precision	18.8%	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: 1,898
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	620 ±134	32.7% ±6.3 pp	45.3%	46.9%
Other family: male householder, no spouse present	166 ±74	8.7% ±3.8 pp	4.9%	5.1%
Other family: female householder, no spouse present	108 ±74 · low precision	5.7% ±3.9 pp · low precision	11.9%	12.2%
Nonfamily: householder living alone	906 ±194	47.7% ±9.1 pp	31.2%	28.7%
Nonfamily: householder not living alone	98 ±64 · low precision	5.2% ±3.3 pp · low precision	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 1,898
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	453 ±120	23.9% ±5.9 pp	28.6%	29.5%
Households without people under 18	1,445 ±191	76.1% ±6.9 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 1,898
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	906 ±194	47.7% ±9.1 pp	31.2%	28.7%
Two-person households	515 ±123	27.1% ±5.9 pp	32.3%	33.8%
Three-person households	215 ±97	11.3% ±5.0 pp	14.7%	15.3%
Four-person households	213 ±89	11.2% ±4.6 pp	12.6%	12.6%
Five-person households	30 ±40 · low precision	1.6% ±2.1 pp · low precision	5.8%	5.9%
Six-person households	12 ±21 · low precision	0.6% ±1.1 pp · low precision	2.1%	2.2%
Seven or more people	7 ±16 · low precision	0.4% ±0.8 pp · low precision	1.3%	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: 3,771
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	3,719 ±254	98.6% ±1.9 pp	85.3%	85.9%
Foreign born	52 ±43 · low precision	1.4% ±1.1 pp · low precision	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 3,615
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	3,590 ±270	99.3% ±1.8 pp	76.0%	77.7%
Spanish	0 ±13 · low precision	0.0% ±0.4 pp · low precision	14.0%	13.6%
French, Haitian, or Cajun	0 ±13 · low precision	0.0% ±0.4 pp · low precision	0.3%	0.7%
German or other West Germanic	0 ±13 · low precision	0.0% ±0.4 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	0 ±13 · low precision	0.0% ±0.4 pp · low precision	2.5%	0.7%
Other Indo-European	0 ±13 · low precision	0.0% ±0.4 pp · low precision	2.6%	2.0%
Korean	0 ±13 · low precision	0.0% ±0.4 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	11 ±18 · low precision	0.3% ±0.5 pp · low precision	0.9%	1.1%
Vietnamese	0 ±13 · low precision	0.0% ±0.4 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	0 ±13 · low precision	0.0% ±0.4 pp · low precision	0.7%	0.6%
Other Asian and Pacific Island	14 ±23 · low precision	0.4% ±0.6 pp · low precision	1.0%	1.1%
Arabic	0 ±13 · low precision	0.0% ±0.4 pp · low precision	0.6%	0.5%
Other and unspecified	0 ±13 · low precision	0.0% ±0.4 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: 2,783
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	239 ±96	8.6% ±3.3 pp	9.5%	10.4%
High school graduate or equivalency	1,106 ±215	39.7% ±6.7 pp	25.1%	26.0%
Some college, no degree	595 ±154	21.4% ±5.1 pp	19.2%	19.1%
Associate’s degree	381 ±153	13.7% ±5.3 pp	8.3%	8.8%
Bachelor’s degree	326 ±128	11.7% ±4.5 pp	22.6%	21.6%
Graduate or professional degree	136 ±103 · low precision	4.9% ±3.7 pp · low precision	15.3%	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: 3,761
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	3,117 ±367	82.9% ±8.1 pp	88.9%	87.7%
Moved within same county	437 ±251 · low precision	11.6% ±6.6 pp · low precision	6.4%	6.3%
Moved from a different county in the same state	191 ±170 · low precision	5.1% ±4.5 pp · low precision	2.4%	3.1%
Moved from a different state	5 ±11 · low precision	0.1% ±0.3 pp · low precision	1.6%	2.3%
Moved from abroad	11 ±16 · low precision	0.3% ±0.4 pp · low precision	0.6%	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

6.5% of Eldorado residents (±4.1 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 72.8% 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	Eldorado	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	6.5% ±4.1 pp · low precision	6.9%	8.4%	Not statistically different
Households with a broadband subscription Households	72.8% ±6.1 pp	90.8%	91.0%	Lower
Veterans Civilian population age 18 and older	8.4% ±3.2 pp	4.8%	6.2%	Higher

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 Eldorado . 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 Eldorado housing and cost context or return to the city profile.