Rock Valley, Iowa demographics

Rock Valley, IA demographics: median age 35.1; 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 · Rock Valley city, Iowa · Incorporated city · GEOID 1968205. The survey estimates a population of 4,059 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Rock Valley is 35.1 years, with a 90% margin of error of 6.7 years. There are 1,452 households (±147). 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	35.1 ±6.7	38.6 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 4,059
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Under 18	1,168 ±236	28.8% ±5.8 pp	22.9%	22.0%
18–34	850 ±223	20.9% ±5.5 pp	22.5%	22.8%
35–64	1,266 ±258	31.2% ±6.4 pp	36.5%	38.0%
65 and older	775 ±189	19.1% ±4.6 pp	18.1%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 4,059
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Male	2,024 ±132	49.9% ±3.2 pp	50.2%	49.5%
Female	2,035 ±133	50.1% ±3.3 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: 4,059
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
White alone	2,609 ±335	64.3% ±8.2 pp	84.1%	61.0%
Black or African American alone	0 ±10 · low precision	0.0% ±0.2 pp · low precision	3.9%	12.2%
American Indian and Alaska Native alone	0 ±10 · low precision	0.0% ±0.2 pp · low precision	0.4%	0.9%
Asian alone	22 ±34 · low precision	0.5% ±0.8 pp · low precision	2.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±10 · low precision	0.0% ±0.2 pp · low precision	0.2%	0.2%
Some other race alone	619 ±490 · low precision	15.3% ±12.1 pp · low precision	2.4%	7.1%
Two or more races	809 ±551 · low precision	19.9% ±13.6 pp · low precision	6.6%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 4,059
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Not Hispanic or Latino	2,513 ±348	61.9% ±8.6 pp	92.7%	80.7%
Hispanic or Latino	1,546 ±352	38.1% ±8.7 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: 1,452
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Married-couple family	809 ±142	55.7% ±8.0 pp	48.3%	46.9%
Other family: male householder, no spouse present	59 ±60 · low precision	4.1% ±4.1 pp · low precision	4.3%	5.1%
Other family: female householder, no spouse present	121 ±71 · low precision	8.3% ±4.8 pp · low precision	9.0%	12.2%
Nonfamily: householder living alone	452 ±107	31.1% ±6.7 pp	30.9%	28.7%
Nonfamily: householder not living alone	11 ±26 · low precision	0.8% ±1.8 pp · low precision	7.6%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 1,452
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Households with people under 18	457 ±91	31.5% ±5.4 pp	28.5%	29.5%
Households without people under 18	995 ±177	68.5% ±10.0 pp	71.5%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 1,452
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
One-person nonfamily households	452 ±107	31.1% ±6.7 pp	30.9%	28.7%
Two-person households	425 ±130	29.3% ±8.4 pp	36.3%	33.8%
Three-person households	62 ±50 · low precision	4.3% ±3.4 pp · low precision	12.9%	15.3%
Four-person households	116 ±86 · low precision	8.0% ±5.8 pp · low precision	11.4%	12.6%
Five-person households	169 ±111 · low precision	11.6% ±7.6 pp · low precision	5.6%	5.9%
Six-person households	196 ±116 · low precision	13.5% ±7.9 pp · low precision	1.9%	2.2%
Seven or more people	32 ±34 · low precision	2.2% ±2.4 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: 4,059
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Native	3,305 ±188	81.4% ±4.6 pp	94.1%	85.9%
Foreign born	754 ±189	18.6% ±4.7 pp	5.9%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 3,823
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
English only	2,372 ±345	62.0% ±8.9 pp	90.9%	77.7%
Spanish	1,403 ±364	36.7% ±9.5 pp	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	26 ±28 · low precision	0.7% ±0.7 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	0 ±10 · low precision	0.0% ±0.3 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	22 ±34 · low precision	0.6% ±0.9 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: 2,335
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Less than high school graduate	412 ±214 · low precision	17.6% ±9.0 pp · low precision	6.7%	10.4%
High school graduate or equivalency	998 ±260	42.7% ±10.3 pp	30.0%	26.0%
Some college, no degree	348 ±166	14.9% ±7.0 pp	19.7%	19.1%
Associate’s degree	189 ±106 · low precision	8.1% ±4.5 pp · low precision	12.1%	8.8%
Bachelor’s degree	322 ±139	13.8% ±5.8 pp	20.9%	21.6%
Graduate or professional degree	66 ±54 · low precision	2.8% ±2.3 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: 4,046
Category	Count ± MOE	Share ± MOE (pp)	Iowa	U.S.
Same house	3,801 ±143	93.9% ±3.5 pp	87.1%	87.7%
Moved within same county	99 ±81 · low precision	2.4% ±2.0 pp · low precision	6.7%	6.3%
Moved from a different county in the same state	65 ±84 · low precision	1.6% ±2.1 pp · low precision	3.7%	3.1%
Moved from a different state	0 ±10 · low precision	0.0% ±0.2 pp · low precision	2.2%	2.3%
Moved from abroad	81 ±91 · low precision	2.0% ±2.2 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

18.1% of Rock Valley residents (±9.3 percentage points) had no health insurance coverage when surveyed, compared with 5.0% in Iowa and 8.4% nationally. 90.6% 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	Rock Valley	Iowa	U.S.	Compared with Iowa
People without health insurance Civilian noninstitutionalized population	18.1% ±9.3 pp · low precision	5.0%	8.4%	Higher
Households with a broadband subscription Households	90.6% ±4.1 pp	88.9%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	2.5% ±1.5 pp · low precision	6.5%	6.2%	Lower

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 Rock Valley . 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 Rock Valley housing and cost context or return to the city profile.