Round Lake Beach, Illinois demographics

Round Lake Beach, IL demographics: median age 33.8; 16.2% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Round Lake Beach village, Illinois · Incorporated village · GEOID 1766040. The survey estimates a population of 27,079 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Round Lake Beach is 33.8 years, with a 90% margin of error of 1.8 years. There are 8,537 households (±437). 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	33.8 ±1.8	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 27,079
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	7,510 ±759	27.7% ±2.8 pp	21.8%	22.0%
18–34	6,442 ±661	23.8% ±2.4 pp	22.7%	22.8%
35–64	10,679 ±877	39.4% ±3.2 pp	38.5%	38.0%
65 and older	2,448 ±318	9.0% ±1.2 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 27,079
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	14,203 ±548	52.5% ±2.0 pp	49.4%	49.5%
Female	12,876 ±543	47.5% ±2.0 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: 27,079
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	11,754 ±1,450	43.4% ±5.4 pp	61.0%	61.0%
Black or African American alone	1,126 ±445	4.2% ±1.6 pp	13.6%	12.2%
American Indian and Alaska Native alone	255 ±197 · low precision	0.9% ±0.7 pp · low precision	0.6%	0.9%
Asian alone	583 ±231	2.2% ±0.9 pp	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	32 ±47 · low precision	0.1% ±0.2 pp · low precision	0.0%	0.2%
Some other race alone	6,222 ±1,287	23.0% ±4.8 pp	7.9%	7.1%
Two or more races	7,107 ±1,145	26.2% ±4.2 pp	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 27,079
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	11,881 ±1,203	43.9% ±4.4 pp	81.2%	80.7%
Hispanic or Latino	15,198 ±1,204	56.1% ±4.4 pp	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: 8,537
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	4,426 ±436	51.8% ±4.4 pp	45.3%	46.9%
Other family: male householder, no spouse present	1,010 ±344	11.8% ±4.0 pp	4.9%	5.1%
Other family: female householder, no spouse present	1,037 ±265	12.1% ±3.0 pp	11.9%	12.2%
Nonfamily: householder living alone	1,680 ±363	19.7% ±4.1 pp	31.2%	28.7%
Nonfamily: householder not living alone	384 ±160	4.5% ±1.9 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 8,537
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	3,485 ±254	40.8% ±2.1 pp	28.6%	29.5%
Households without people under 18	5,052 ±523	59.2% ±5.3 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 8,537
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	1,680 ±363	19.7% ±4.1 pp	31.2%	28.7%
Two-person households	2,052 ±371	24.0% ±4.2 pp	32.3%	33.8%
Three-person households	1,502 ±383	17.6% ±4.4 pp	14.7%	15.3%
Four-person households	1,069 ±311	12.5% ±3.6 pp	12.6%	12.6%
Five-person households	1,505 ±356	17.6% ±4.1 pp	5.8%	5.9%
Six-person households	323 ±160	3.8% ±1.9 pp	2.1%	2.2%
Seven or more people	406 ±200	4.8% ±2.3 pp	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: 27,079
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	20,060 ±915	74.1% ±3.4 pp	85.3%	85.9%
Foreign born	7,019 ±920	25.9% ±3.4 pp	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 25,301
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	12,528 ±1,230	49.5% ±4.8 pp	76.0%	77.7%
Spanish	11,727 ±1,255	46.3% ±4.9 pp	14.0%	13.6%
French, Haitian, or Cajun	44 ±60 · low precision	0.2% ±0.2 pp · low precision	0.3%	0.7%
German or other West Germanic	53 ±54 · low precision	0.2% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	383 ±185	1.5% ±0.7 pp	2.5%	0.7%
Other Indo-European	171 ±128 · low precision	0.7% ±0.5 pp · low precision	2.6%	2.0%
Korean	37 ±56 · low precision	0.1% ±0.2 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	14 ±16 · low precision	0.1% ±0.1 pp · low precision	0.9%	1.1%
Vietnamese	0 ±24 · low precision	0.0% ±0.1 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	194 ±99 · low precision	0.8% ±0.4 pp · low precision	0.7%	0.6%
Other Asian and Pacific Island	56 ±57 · low precision	0.2% ±0.2 pp · low precision	1.0%	1.1%
Arabic	74 ±86 · low precision	0.3% ±0.3 pp · low precision	0.6%	0.5%
Other and unspecified	20 ±21 · low precision	0.1% ±0.1 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: 17,214
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	4,015 ±618	23.3% ±3.5 pp	9.5%	10.4%
High school graduate or equivalency	5,523 ±650	32.1% ±3.6 pp	25.1%	26.0%
Some college, no degree	3,512 ±624	20.4% ±3.5 pp	19.2%	19.1%
Associate’s degree	1,380 ±265	8.0% ±1.5 pp	8.3%	8.8%
Bachelor’s degree	2,118 ±392	12.3% ±2.2 pp	22.6%	21.6%
Graduate or professional degree	666 ±236	3.9% ±1.4 pp	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: 26,634
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	24,844 ±591	93.3% ±2.1 pp	88.9%	87.7%
Moved within same county	1,096 ±506	4.1% ±1.9 pp	6.4%	6.3%
Moved from a different county in the same state	455 ±209	1.7% ±0.8 pp	2.4%	3.1%
Moved from a different state	232 ±168 · low precision	0.9% ±0.6 pp · low precision	1.6%	2.3%
Moved from abroad	7 ±11 · low precision	0.0% ±0.0 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

15.6% of Round Lake Beach residents (±2.9 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 95.4% 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	Round Lake Beach	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	15.6% ±2.9 pp	6.9%	8.4%	Higher
Households with a broadband subscription Households	95.4% ±0.9 pp	90.8%	91.0%	Higher
Veterans Civilian population age 18 and older	6.3% ±1.8 pp	4.8%	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 Round Lake Beach . 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 Round Lake Beach housing and cost context or return to the city profile.