San Jose: Demographics & People
San Jose is home to 557 people, in 213 households. Population shrank 7.8% from 604 (2022) to 557 (2024). Median age 34.0 years. (11.4y younger than Mason County; 3.7y younger than Illinois). Children under 18 are 28% of the population. Population is 73% White (non-Hispanic) and 5% Hispanic or Latino. The community is relatively homogeneous (Simpson index 0.09). 63% of households are family-led. County is losing 102 residents per year (2022-2023). County health: 39% adult obesity, 18% smoke.
- 2.6 people per household (vs Illinois avg 2.5).
- 37% non-family households (singles, roommates) (vs Illinois 38%).
- 61 dependents per 100 working-age (youth + seniors / 18-64) (vs Illinois 64).
Population & Trend
Population shrank 7.8% from 604 (2022) to 557 (2024). Estimated 2026 population: ~514 (extrapolated at -3.9%/yr trend). Census Bureau Vintage estimate: 461.
| Census data vintage | 2024 |
|---|---|
| Population | 27,987 people |
| Annual growth rate · Population change | -7.8% |
| Annual growth rate · Population (2022) | 604 |
| Annual growth rate · Population (2024) | 557 |
| Annual growth rate · Trend category | shrinking |
| Population | 557 people (vs Illinois 39,460) |
| Population Estimate | 461 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 34.0y is 4.9 years younger than the U.S. median (38.9y). Children under 18 make up 28% — above the U.S. share of ~22%.
| Age Summary · Median age | 34.0 years (vs Illinois 37.7y) |
|---|---|
| Age Summary · Children Pct | 27.5% |
| Age Summary · Character | young professional |
| Age Summary · Total Pop | 557 |
| Age Summary · Under 18 | 153 |
| Age Summary · 18 To 34 | 152.0× |
| Age Summary · 35 To 64 | 195.0× |
| Age Summary · 65 Plus | 57 |
| Population under 18 | 153 |
| Median age | 34.0 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 557 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.09 (0 = single group, 1 = perfectly even distribution); this is read as relatively homogeneous.
| White residents | 517 |
|---|---|
| Asian residents | 20 |
| Hispanic or Latino residents | 4 |
| Diversity Index · Diversity index (Simpson) | 8.5% |
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 3 |
| Diversity Index · Largest group share | 95.6% |
| Asian population | 3.2% (vs Illinois 6.1%) |
| Hispanic or Latino population | 4.8% (vs Illinois 17.6%) |
| White (non-Hispanic) population | 72.7% (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).
| Residents born in this state | 436 |
|---|---|
| Residents born in another state | 121 |
| Share born in this state | 78.3% |
| Share born in another state | 21.7% |
| Native-born U.S. citizens | 21.7% |
| Total foreign-born residents | 356 |
Households & Family Composition
213 households. Averaging 2.6 people each — larger than the U.S. average of 2.5. 63% are family households — below the U.S. share of ~65%. Of 162 families, 37% are married couples with children.
| Children under 18 | 160 |
|---|---|
| Total families | 162 |
| Married couples with children | 60 |
| Single-parent households | 11 |
| Average household size | 2.65 |
| Women who gave birth (past year) | 9.6% |
| Grandparents living with grandchildren | 2 |
| Family households | 134 households (vs Illinois 9,709) |
| Households that are families | 62.9% (at Illinois median) |
| Total households | 213 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. 18.5% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 102 residents per year on net (IRS migration data).
| Moved within the county (past year) | 18.5% |
|---|---|
| Migration · People moving in (annual) | 23,355 |
| Migration · People moving out (annual) | 23,457 |
| Migration · Net migration (in − out) | -102 |
| 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 | 29 |
|---|---|
| Disability rate | 4.7% |
Other
| Congressional District · District | 15 |
|---|---|
| Congressional District · Formatted | IL-15 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 17107 |
| Cdc Birth Rate · State Fips | 17 |
| Cdc Birth Rate · County Fips | 107 |
| Cdc Birth Rate · County | Logan |
| Cdc Birth Rate · Birth Rate | 19.7% |
| Cdc Birth Rate · Lower Ci | 15.80 |
| Cdc Birth Rate · Upper Ci | 24.30 |
| Cdc Mortality · Fips | 17107 |
| Cdc Mortality · County | Logan County |
| Cdc Mortality · Urban Rural | Micropolitan |
| Cdc Mortality · Total Deaths 2020 2023 | 1,089 |
| Cdc Vaccination · Fips | 17107 |
| Cdc Vaccination · County | Logan County |
| Cdc Vaccination · Dose1 Pop Pct | 58.1% |
| Cdc Vaccination · Series Complete Pct | 54.7% |
| Cdc Vaccination · Booster Pct | 53.8% |
| Cdc Vaccination · Population 2019 | 28,618 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 8.50 |
| Family Score · Schools | 15 |
| Family Score · Children Pct | 27.5% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 557, shrinking, young professional, middle-class, mixed |
| Town Summary · Population | 557 people (vs Illinois 39,460) |
| Town Summary · County | Logan County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade