Derby, Kansas demographics

Derby, KS demographics: median age 35.9; 37.6% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Derby city, Kansas · Incorporated city · GEOID 2017800. The survey estimates a population of 26,062 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Derby is 35.9 years, with a 90% margin of error of 2.1 years. There are 10,447 households (±474). 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	35.9 ±2.1	37.4 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 26,062
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Under 18	6,965 ±638	26.7% ±2.4 pp	23.8%	22.0%
18–34	5,405 ±576	20.7% ±2.2 pp	23.1%	22.8%
35–64	9,350 ±685	35.9% ±2.6 pp	36.2%	38.0%
65 and older	4,342 ±571	16.7% ±2.2 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 26,062
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Male	12,874 ±491	49.4% ±1.9 pp	50.2%	49.5%
Female	13,188 ±494	50.6% ±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: 26,062
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
White alone	21,016 ±811	80.6% ±3.1 pp	76.0%	61.0%
Black or African American alone	537 ±327 · low precision	2.1% ±1.3 pp · low precision	5.3%	12.2%
American Indian and Alaska Native alone	232 ±149 · low precision	0.9% ±0.6 pp · low precision	0.8%	0.9%
Asian alone	270 ±135	1.0% ±0.5 pp	2.9%	6.0%
Native Hawaiian and Other Pacific Islander alone	16 ±28 · low precision	0.1% ±0.1 pp · low precision	0.1%	0.2%
Some other race alone	853 ±526 · low precision	3.3% ±2.0 pp · low precision	4.2%	7.1%
Two or more races	3,138 ±657	12.0% ±2.5 pp	10.6%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 26,062
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Not Hispanic or Latino	22,708 ±827	87.1% ±3.2 pp	86.4%	80.7%
Hispanic or Latino	3,354 ±824	12.9% ±3.2 pp	13.6%	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: 10,447
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Married-couple family	5,654 ±331	54.1% ±2.0 pp	49.1%	46.9%
Other family: male householder, no spouse present	354 ±145	3.4% ±1.4 pp	4.5%	5.1%
Other family: female householder, no spouse present	835 ±194	8.0% ±1.8 pp	9.8%	12.2%
Nonfamily: householder living alone	3,276 ±580	31.4% ±5.4 pp	30.0%	28.7%
Nonfamily: householder not living alone	328 ±138	3.1% ±1.3 pp	6.5%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 10,447
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Households with people under 18	3,204 ±224	30.7% ±1.6 pp	30.1%	29.5%
Households without people under 18	7,243 ±599	69.3% ±4.8 pp	69.9%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 10,447
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
One-person nonfamily households	3,276 ±580	31.4% ±5.4 pp	30.0%	28.7%
Two-person households	3,505 ±357	33.6% ±3.1 pp	35.2%	33.8%
Three-person households	1,314 ±306	12.6% ±2.9 pp	13.7%	15.3%
Four-person households	1,495 ±244	14.3% ±2.2 pp	11.7%	12.6%
Five-person households	438 ±125	4.2% ±1.2 pp	5.7%	5.9%
Six-person households	262 ±108	2.5% ±1.0 pp	2.4%	2.2%
Seven or more people	157 ±85 · low precision	1.5% ±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: 26,062
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Native	25,416 ±229	97.5% ±0.9 pp	92.6%	85.9%
Foreign born	646 ±223	2.5% ±0.9 pp	7.4%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 24,391
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
English only	23,112 ±522	94.8% ±1.9 pp	87.9%	77.7%
Spanish	914 ±397	3.7% ±1.6 pp	8.1%	13.6%
French, Haitian, or Cajun	64 ±99 · low precision	0.3% ±0.4 pp · low precision	0.2%	0.7%
German or other West Germanic	81 ±80 · low precision	0.3% ±0.3 pp · low precision	0.4%	0.5%
Russian, Polish, or other Slavic	16 ±26 · low precision	0.1% ±0.1 pp · low precision	0.2%	0.7%
Other Indo-European	63 ±58 · low precision	0.3% ±0.2 pp · low precision	0.6%	2.0%
Korean	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	9 ±20 · low precision	0.0% ±0.1 pp · low precision	0.4%	1.1%
Vietnamese	28 ±47 · low precision	0.1% ±0.2 pp · low precision	0.4%	0.5%
Tagalog, including Filipino	49 ±52 · low precision	0.2% ±0.2 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	37 ±36 · low precision	0.2% ±0.1 pp · low precision	0.8%	1.1%
Arabic	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.2%	0.5%
Other and unspecified	18 ±28 · low precision	0.1% ±0.1 pp · low precision	0.5%	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: 17,007
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Less than high school graduate	718 ±216	4.2% ±1.3 pp	8.0%	10.4%
High school graduate or equivalency	3,941 ±536	23.2% ±3.0 pp	25.4%	26.0%
Some college, no degree	4,153 ±480	24.4% ±2.7 pp	21.8%	19.1%
Associate’s degree	1,794 ±323	10.5% ±1.9 pp	9.1%	8.8%
Bachelor’s degree	4,242 ±573	24.9% ±3.2 pp	22.2%	21.6%
Graduate or professional degree	2,159 ±355	12.7% ±2.0 pp	13.4%	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: 25,683
Category	Count ± MOE	Share ± MOE (pp)	Kansas	U.S.
Same house	22,062 ±708	85.9% ±2.7 pp	85.7%	87.7%
Moved within same county	2,351 ±621	9.2% ±2.4 pp	7.5%	6.3%
Moved from a different county in the same state	668 ±310	2.6% ±1.2 pp	3.2%	3.1%
Moved from a different state	547 ±255	2.1% ±1.0 pp	3.0%	2.3%
Moved from abroad	55 ±54 · low precision	0.2% ±0.2 pp · low precision	0.5%	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

6.1% of Derby residents (±1.7 percentage points) had no health insurance coverage when surveyed, compared with 8.8% in Kansas and 8.4% nationally. 94.5% 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	Derby	Kansas	U.S.	Compared with Kansas
People without health insurance Civilian noninstitutionalized population	6.1% ±1.7 pp	8.8%	8.4%	Lower
Households with a broadband subscription Households	94.5% ±1.6 pp	90.7%	91.0%	Higher
Veterans Civilian population age 18 and older	11.2% ±2.1 pp	6.8%	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 Derby . 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 Derby housing and cost context or return to the city profile.