Westerville: Demographics & People
38,645 people call Westerville home, in 15,208 households. Population grew 0.3% from 38,543 (2022) to 38,645 (2024). Median age 40.7 years. (5.9y older than Franklin County; 2.6y older than Ohio). Children under 18 are 23% of the population. Population is 81% White (non-Hispanic) and 8% Black. The community is somewhat diverse (Simpson index 0.25). 70% of households are family-led. County is gaining 9,607 residents per year (2022-2023). County health: 32% adult obesity, 12% smoke.
- 2.5 people per household (vs Ohio avg 2.4).
- 30% non-family households (singles, roommates) (vs Ohio 44%).
- 79 dependents per 100 working-age (youth + seniors / 18-64) (vs Ohio 67).
Population & Trend
Population grew 0.3% from 38,543 (2022) to 38,645 (2024) — close to the U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~38,745 (extrapolated at 0.1%/yr trend). Census Bureau Vintage estimate: 38,878.
| Census data vintage | 2024 |
|---|---|
| Population | 214,124 people |
| Annual growth rate · Population change | 0.3% |
| Annual growth rate · Population (2022) | 38,543 |
| Annual growth rate · Population (2024) | 38,645 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | stable |
| Population | 38,645 people (vs Ohio 29,269) |
| Population Estimate | 38,878 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 40.7y is 1.8 years older than the U.S. median (38.9y). Children under 18 make up 23% — near the U.S. share of ~22%.
| Age Summary · Median age | 40.7 years (vs Ohio 38.1y) |
|---|---|
| Age Summary · Children Pct | 22.6% |
| Age Summary · Character | established |
| Age Summary · Total Pop | 38,645 |
| Age Summary · Under 18 | 8,736 |
| Age Summary · 18 To 34 | 7,720.0× |
| Age Summary · 35 To 64 | 13,883.0× |
| Age Summary · 65 Plus | 8,306 |
| Population under 18 | 8,736 |
| Median age | 40.7 years (vs Ohio 38.1y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 38,645 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.25 (0 = single group, 1 = perfectly even distribution); this is read as somewhat diverse.
| White residents | 31,492 |
|---|---|
| Black residents | 3,248 |
| Asian residents | 1,070 |
| Hispanic or Latino residents | 869 |
| Diversity Index · Diversity index (Simpson) | 25.4% |
| Diversity Index · Diversity label | somewhat diverse |
| Diversity Index · Groups counted | 4 |
| Diversity Index · Largest group share | 85.9% |
| Asian population | 2.8% (vs Ohio 1.9%) |
| Black population | 8.5% (vs Ohio 8.0%) |
| Hispanic or Latino population | 2.8% (vs Ohio 4.5%) |
| White (non-Hispanic) population | 80.7% (vs Ohio 77.9%) |
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)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS). 1.0% are foreign-born — below the U.S. average of 13.9%. 6% have naturalized to U.S. citizenship.
| Residents born in this state | 26,321 |
|---|---|
| Residents born in another state | 9,663 |
| Share born in this state | 68.1% |
| Share born in another state | 31.9% |
| Native-born U.S. citizens | 25.0% |
| Foreign-born residents | 1.0% |
| Naturalized citizens | 5.9% |
| Total foreign-born residents | 2,512 |
| From Europe | 366 |
| From Africa | 1,010 |
Households & Family Composition
15,208 households. Averaging 2.4 people each — matches the U.S. average of 2.5. 70% are family households — above the U.S. share of ~65%. Of 10,756 families, 38% are married couples with children.
| Children under 18 | 8,938 |
|---|---|
| Total families | 10,756 |
| Married couples with children | 4,051 |
| Single-parent households | 246 |
| Average household size | 2.44 |
| Women who gave birth (past year) | 13.6% |
| Grandparents living with grandchildren | 456 |
| Grandparents responsible for grandchildren | 179 |
| Family households | 10,620 households (vs Ohio 7,027) |
| Households that are families | 69.8% (vs Ohio 55.9%) |
| Total households | 15,208 households (vs Ohio 12,056) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 10.9% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 9,607 residents per year on net (IRS migration data).
| Moved within the county (past year) | 10.9% |
|---|---|
| Migration · People moving in (annual) | 244,611 |
| Migration · People moving out (annual) | 235,004 |
| Migration · Net migration (in − out) | 9,607 |
| Migration · Population growing | Yes |
| Migration · Year | 2022-2023 |
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 disability | 1,691 |
|---|---|
| Disability rate | 4.4% |
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. 1,627 residents live in group quarters (4.2% of population).
| Living in group quarters | 1,627 |
|---|
Other
| Congressional District · District | 12 |
|---|---|
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 39041 |
| Cdc Birth Rate · State Fips | 39 |
| Cdc Birth Rate · County Fips | 041 |
| Cdc Birth Rate · County | Delaware |
| Cdc Birth Rate · Birth Rate | 4.2% |
| Cdc Birth Rate · Lower Ci | 3.50 |
| Cdc Birth Rate · Upper Ci | 4.90 |
| Cdc Mortality · Fips | 39041 |
| Cdc Mortality · County | Delaware County |
| Cdc Mortality · Urban Rural | Large fringe metro |
| Cdc Mortality · Total Deaths 2020 2023 | 3,556 |
| Cdc Vaccination · Fips | 39041 |
| Cdc Vaccination · County | Delaware County |
| Cdc Vaccination · Dose1 Pop Pct | 82.5% |
| Cdc Vaccination · Series Complete Pct | 78.6% |
| Cdc Vaccination · Booster Pct | 61.9% |
| Cdc Vaccination · Population 2019 | 209,177 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 10 |
| Family Score · Schools | 23 |
| Family Score · Childcare Centers | 36 |
| Family Score · Youth Sports Orgs | 1 |
| Family Score · Children Pct | 22.6% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 38,645, stable, established, affluent, white collar |
| Town Summary · Population | 38,645 people (vs Ohio 29,269) |
| Town Summary · County | Delaware County |
Sources: NCES school congressional district assignment · federal dataset cascade