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Kiel: Demographics & People

3,943 people call Kiel home, in 1,647 households. Population grew 0.6% from 3,919 (2022) to 3,943 (2024). Median age 45.2 years. (6.9y older than Wisconsin). Children under 18 are 20% of the population. Population is 93% White (non-Hispanic) and 2% Hispanic or Latino. The community is relatively homogeneous (Simpson index 0.07). 66% of households are family-led. County is gaining 553 residents per year (2022-2023). County health: 40% adult obesity, 16% smoke.

Population & Trend

Population grew 0.6% from 3,919 (2022) to 3,943 (2024) — close to the U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~3,967 (extrapolated at 0.3%/yr trend). Census Bureau Vintage estimate: 3,999.

Census data vintage2024
Population52,442 people
Annual growth rate · Population change0.6%
Annual growth rate · Population (2022)3,919
Annual growth rate · Population (2024)3,943
Annual growth rate · Population growingYes
Annual growth rate · Trend categorystable
Population3,943 people (vs Wisconsin 25,785)
Population Estimate3,999

Sources: Census ACS 5-Year 2023, Table B01003  ·  Refreshed 2026-04-12

Age Distribution

Median age 45.2y is 6.3 years older than the U.S. median (38.9y). Children under 18 make up 20% — below the U.S. share of ~22%.

Age Summary · Median age45.2 years (vs Wisconsin 38.3y)
Age Summary · Children Pct19.5%
Age Summary · Characterestablished
Age Summary · Total Pop3,943
Age Summary · Under 18769
Age Summary · 18 To 34709.0×
Age Summary · 35 To 641,692.0×
Age Summary · 65 Plus773
Population under 18769
Median age45.2 years (vs Wisconsin 38.3y)

Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023  ·  Refreshed 2026-04-29

Race, Ethnicity & Diversity

Of 3,943 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.07 (0 = single group, 1 = perfectly even distribution); this is read as relatively homogeneous.

White residents3,683
Asian residents27
Hispanic or Latino residents104
Diversity Index · Diversity index (Simpson)6.7%
Diversity Index · Diversity labelrelatively homogeneous
Diversity Index · Groups counted3
Diversity Index · Largest group share96.6%
Asian population0.4% (vs Wisconsin 3.1%)
Hispanic or Latino population1.8% (vs Wisconsin 6.6%)
White (non-Hispanic) population93.1% (vs Wisconsin 81.6%)

Sources: Census ACS 5-Year 2023  ·  Refreshed 2026-04-12

Ancestry

Self-reported ancestry from Census ACS — what residents report as their ethnic origin, separate from race. Counts can exceed population because people can list multiple ancestries.

Top (8)

(unnamed)
German
(unnamed)
American
(unnamed)
English
(unnamed)
Polish
(unnamed)
Irish
(unnamed)
Hispanic Total
(unnamed)
Puerto Rican
(unnamed)
Italian

Citizenship & Origin

Where residents were born and their citizenship status (Census ACS). 1.5% are foreign-born — below the U.S. average of 13.9%. 1% have naturalized to U.S. citizenship.

Residents born in this state3,441
Residents born in another state398
Share born in this state87.3%
Share born in another state12.7%
Native-born U.S. citizens10.1%
Foreign-born residents1.5%
Naturalized citizens1.2%
Total foreign-born residents53
From Europe27
From Africa26

Households & Family Composition

1,647 households. Averaging 2.3 people each — smaller than the U.S. average of 2.5. 66% are family households — near the U.S. share of ~65%. Of 1,012 families, 30% are married couples with children.

Children under 18802
Total families1,012
Married couples with children306
Single-parent households43
Average household size2.30
Women who gave birth (past year)14.9%
Grandparents living with grandchildren30
Grandparents responsible for grandchildren13
Family households1,093 households (vs Wisconsin 7,092)
Households that are families66.4% (vs Wisconsin 57.2%)
Total households1,647 households (vs Wisconsin 10,843)

Sources: Census ACS 5-Year 2023  ·  Refreshed 2026-04-12

Residential Stability & Migration

How long residents have lived here and where they came from. 6.9% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 553 residents per year on net (IRS migration data).

Moved within the county (past year)6.9%
Migration · People moving in (annual)55,786
Migration · People moving out (annual)55,233
Migration · Net migration (in − out)553
Migration · Population growingYes
Migration · Year2022-2023

Sources: IRS SOI Migration 2021-2022  ·  Refreshed 2026-04-12

Disability

Census ACS measures self-reported functional limitations — vision, hearing, mobility, cognitive, self-care, or independent-living. The U.S. baseline disability rate is about 12–13%; rates trend higher with median age.

Residents with a disability256
Disability rate6.6%

Group Quarters

Group quarters are non-household living arrangements counted by the Census — college dormitories, nursing homes, military barracks, group homes, correctional facilities, and similar institutional or shared housing. 5 residents live in group quarters (0.1% of population).

Living in group quarters5

Other

Congressional District · District6
Congressional District · Congress118th
Cdc Birth Rate · Fips55015
Cdc Birth Rate · State Fips55
Cdc Birth Rate · County Fips015
Cdc Birth Rate · CountyCalumet
Cdc Birth Rate · Birth Rate7.0%
Cdc Birth Rate · Lower Ci5.40
Cdc Birth Rate · Upper Ci9.00
Cdc Mortality · Fips55015
Cdc Mortality · CountyCalumet County
Cdc Mortality · Urban RuralSmall metro
Cdc Mortality · Total Deaths 2020 2023947
Cdc Vaccination · Fips55015
Cdc Vaccination · CountyCalumet County
Cdc Vaccination · Dose1 Pop Pct61.5%
Cdc Vaccination · Series Complete Pct58.1%
Cdc Vaccination · Booster Pct62.9%
Cdc Vaccination · Population 201950,089
Cdc Vaccination · Metro StatusMetro
Family Score · Score4.10
Family Score · Schools5
Family Score · Childcare Centers2
Family Score · Children Pct19.5%
Family Score · Ratingfair
Town Summary · Key Factspopulation 3,943, stable, established, upper-middle, blue collar
Town Summary · Population3,943 people (vs Wisconsin 25,785)
Town Summary · CountyCalumet County

Sources: NCES school congressional district assignment · federal dataset cascade