Allerton: Demographics & People
205 people call Allerton home, in 99 households. Population shrank 5.5% from 217 (2022) to 205 (2024). Median age 51.5 years. (10.2y older than Vermilion County; 13.8y older than Illinois). Children under 18 are 15% of the population. Population is 89% White (non-Hispanic) and 4% Black. The community is somewhat diverse (Simpson index 0.23). 62% of households are family-led. County is losing 6,912 residents per year (2022-2023). County health: 36% adult obesity, 16% smoke.
- 2.1 people per household (vs Illinois avg 2.5).
- 38% non-family households (singles, roommates) (vs Illinois 38%).
- 68 dependents per 100 working-age (youth + seniors / 18-64) (vs Illinois 64).
Population & Trend
Population shrank 5.5% from 217 (2022) to 205 (2024). Estimated 2026 population: ~193 (extrapolated at -2.8%/yr trend). Census Bureau Vintage estimate: 179.
| Census data vintage | 2024 |
|---|---|
| Population | 205,865 people |
| Annual growth rate · Population change | -5.5% |
| Annual growth rate · Population (2022) | 217 |
| Annual growth rate · Population (2024) | 205 |
| Annual growth rate · Trend category | shrinking |
| Population | 205 people (vs Illinois 39,460) |
| Population Estimate | 179 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 51.5y is 12.6 years older than the U.S. median (38.9y). Children under 18 make up 15% — below the U.S. share of ~22%.
| Age Summary · Median age | 51.5 years (vs Illinois 37.7y) |
|---|---|
| Age Summary · Children Pct | 15.1% |
| Age Summary · Character | retirement community |
| Age Summary · Total Pop | 205 |
| Age Summary · Under 18 | 31 |
| Age Summary · 18 To 34 | 31.0× |
| Age Summary · 35 To 64 | 91.0× |
| Age Summary · 65 Plus | 52 |
| Population under 18 | 31 |
| Median age | 51.5 years (vs Illinois 37.7y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 205 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.23 (0 = single group, 1 = perfectly even distribution); this is read as somewhat diverse.
| White residents | 185 |
|---|---|
| Black residents | 24 |
| Hispanic or Latino residents | 4 |
| Diversity Index · Diversity index (Simpson) | 23.3% |
| Diversity Index · Diversity label | somewhat diverse |
| Diversity Index · Groups counted | 3 |
| Diversity Index · Largest group share | 86.9% |
| Black population | 3.9% (vs Illinois 9.3%) |
| Hispanic or Latino population | 2.4% (vs Illinois 17.6%) |
| White (non-Hispanic) population | 88.8% (vs Illinois 54.8%) |
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). 0.5% are foreign-born — below the U.S. average of 13.9%. 0% have naturalized to U.S. citizenship.
| Residents born in this state | 176 |
|---|---|
| Residents born in another state | 27 |
| Share born in this state | 85.9% |
| Share born in another state | 14.1% |
| Native-born U.S. citizens | 13.2% |
| Foreign-born residents | 0.5% |
| Naturalized citizens | 0.5% |
| Total foreign-born residents | 2 |
| From Europe | 1 |
| From Africa | 1 |
Households & Family Composition
99 households. Averaging 2.2 people each — smaller than the U.S. average of 2.5. 62% are family households — below the U.S. share of ~65%. Of 63 families, 22% are married couples with children.
| Children under 18 | 46 |
|---|---|
| Total families | 63 |
| Married couples with children | 14 |
| Single-parent households | 5 |
| Average household size | 2.21 |
| Women who gave birth (past year) | 14.4% |
| Grandparents living with grandchildren | 1,573 |
| Grandparents responsible for grandchildren | 727 |
| Family households | 61 households (vs Illinois 9,709) |
| Households that are families | 61.6% (vs Illinois 62.4%) |
| Total households | 99 households (vs Illinois 14,867) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 7.5% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 6,912 residents per year on net (IRS migration data).
| Moved within the county (past year) | 7.5% |
|---|---|
| Migration · People moving in (annual) | 161,950 |
| Migration · People moving out (annual) | 168,862 |
| Migration · Net migration (in − out) | -6,912 |
| 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 | 18 |
|---|---|
| Disability rate | 9.8% |
Other
| Congressional District · District | 15 |
|---|---|
| Congressional District · Formatted | IL-15 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 17019 |
| Cdc Birth Rate · State Fips | 17 |
| Cdc Birth Rate · County Fips | 019 |
| Cdc Birth Rate · County | Champaign |
| Cdc Birth Rate · Birth Rate | 11.4% |
| Cdc Birth Rate · Lower Ci | 10.40 |
| Cdc Birth Rate · Upper Ci | 12.50 |
| Cdc Mortality · Fips | 17019 |
| Cdc Mortality · County | Champaign County |
| Cdc Mortality · Urban Rural | Small metro |
| Cdc Mortality · Total Deaths 2020 2023 | 7,236 |
| Cdc Vaccination · Fips | 17019 |
| Cdc Vaccination · County | Champaign County |
| Cdc Vaccination · Dose1 Pop Pct | 76.0% |
| Cdc Vaccination · Series Complete Pct | 68.3% |
| Cdc Vaccination · Booster Pct | 62.3% |
| Cdc Vaccination · Population 2019 | 209,689 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 10 |
| Family Score · Schools | 20 |
| Family Score · Children Pct | 15.1% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 205, shrinking, retirement community, middle-class, mixed |
| Town Summary · Population | 205 people (vs Illinois 39,460) |
| Town Summary · County | Champaign County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade