Hillsdale: Demographics & People
89 people call Hillsdale home, in 41 households. Population grew 15.6% from 77 (2022) to 89 (2024). Median age 51.2 years. (15.2y older than Garfield County; 16.0y older than Oklahoma). Children under 18 are 17% of the population. Population is 85% White (non-Hispanic). The community is relatively homogeneous (Simpson index 0.00). 56% of households are family-led. County is losing 449 residents per year (2022-2023). County health: 42% adult obesity, 18% smoke.
- 2.2 people per household (vs Oklahoma avg 2.6).
- 44% non-family households (singles, roommates) (vs Oklahoma 39%).
- 71 dependents per 100 working-age (youth + seniors / 18-64) (vs Oklahoma 67).
Population & Trend
Population grew 15.6% from 77 (2022) to 89 (2024) — about 26.0× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~103 (extrapolated at 7.8%/yr trend). Census Bureau Vintage estimate: 124.
| Census data vintage | 2024 |
|---|---|
| Population | 62,846 people |
| Annual growth rate · Population change | 15.6% |
| Annual growth rate · Population (2022) | 77 |
| Annual growth rate · Population (2024) | 89 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | booming |
| Population | 89 people (vs Oklahoma 63,420) |
| Population Estimate | 124 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 51.2y is 12.3 years older than the U.S. median (38.9y). Children under 18 make up 17% — below the U.S. share of ~22%.
| Age Summary · Median age | 51.2 years (vs Oklahoma 35.2y) |
|---|---|
| Age Summary · Children Pct | 16.9% |
| Age Summary · Character | retirement community |
| Age Summary · Total Pop | 89 |
| Age Summary · Under 18 | 15 |
| Age Summary · 18 To 34 | 12.0× |
| Age Summary · 35 To 64 | 40.0× |
| Age Summary · 65 Plus | 22 |
| Population under 18 | 15 |
| Median age | 51.2 years (vs Oklahoma 35.2y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 89 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.00 (0 = single group, 1 = perfectly even distribution); this is read as relatively homogeneous.
| White residents | 60 |
|---|---|
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 1 |
| Diversity Index · Largest group share | 100.0% |
| White (non-Hispanic) population | 85.4% (vs Oklahoma 57.8%) |
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 (3)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS).
| Residents born in this state | 76 |
|---|---|
| Residents born in another state | 13 |
| Share born in this state | 85.4% |
| Share born in another state | 14.6% |
| Native-born U.S. citizens | 14.6% |
| Total foreign-born residents | 4,392 |
Households & Family Composition
41 households. Averaging 2.2 people each — smaller than the U.S. average of 2.5. 56% are family households — below the U.S. share of ~65%. Of 18 families, 17% are married couples with children.
| Children under 18 | 17 |
|---|---|
| Total families | 18 |
| Married couples with children | 3 |
| Single-parent households | 3 |
| Average household size | 2.20 |
| Grandparents living with grandchildren | 1,065 |
| Grandparents responsible for grandchildren | 298 |
| Family households | 23 households (vs Oklahoma 16,590) |
| Households that are families | 56.1% (vs Oklahoma 61.1%) |
| Total households | 41 households (vs Oklahoma 23,671) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 14.9% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 449 residents per year on net (IRS migration data).
| Lived in same home a year ago | 87.0% |
|---|---|
| Moved within the county (past year) | 14.9% |
| Migration · People moving in (annual) | 56,375 |
| Migration · People moving out (annual) | 56,824 |
| Migration · Net migration (in − out) | -449 |
| 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 | 15 |
|---|---|
| Disability rate | 19.5% |
Other
| Congressional District · District | 3 |
|---|---|
| Congressional District · Formatted | OK-03 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 40047 |
| Cdc Birth Rate · State Fips | 40 |
| Cdc Birth Rate · County Fips | 047 |
| Cdc Birth Rate · County | Garfield |
| Cdc Birth Rate · Birth Rate | 32.2% |
| Cdc Birth Rate · Lower Ci | 28.40 |
| Cdc Birth Rate · Upper Ci | 36.30 |
| Cdc Mortality · Fips | 40047 |
| Cdc Mortality · County | Garfield County |
| Cdc Mortality · Urban Rural | Micropolitan |
| Cdc Mortality · Total Deaths 2020 2023 | 2,789 |
| Cdc Vaccination · Fips | 40047 |
| Cdc Vaccination · County | Garfield County |
| Cdc Vaccination · Dose1 Pop Pct | 62.2% |
| Cdc Vaccination · Series Complete Pct | 52.7% |
| Cdc Vaccination · Booster Pct | 39.5% |
| Cdc Vaccination · Population 2019 | 61,056 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 10 |
| Family Score · Schools | 20 |
| Family Score · Children Pct | 16.9% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 89, booming, retirement community, working-class, blue collar |
| Town Summary · Population | 89 people (vs Oklahoma 63,420) |
| Town Summary · County | Garfield County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade