Hydro: Demographics & People
About 1,157 people live in Hydro, in 531 households. Population shrank 1.9% from 1,179 (2022) to 1,157 (2024). Median age 38.0 years. (2.8y older than Oklahoma). Children under 18 are 22% of the population. Population is 80% White (non-Hispanic) and 10% Hispanic or Latino. The community is relatively homogeneous (Simpson index 0.18). 42% of households are family-led. County is losing 118 residents per year (2022-2023). County health: 44% adult obesity, 20% smoke.
- 2.2 people per household (vs Oklahoma avg 2.6).
- 58% non-family households (singles, roommates) (vs Oklahoma 39%).
- 87 dependents per 100 working-age (youth + seniors / 18-64) (vs Oklahoma 67).
Population & Trend
Population shrank 1.9% from 1,179 (2022) to 1,157 (2024). Estimated 2026 population: ~1,135 (extrapolated at -0.9%/yr trend). Census Bureau Vintage estimate: 1,107.
| Census data vintage | 2024 |
|---|---|
| Population | 8,735 people |
| Annual growth rate · Population change | -1.9% |
| Annual growth rate · Population (2022) | 1,179 |
| Annual growth rate · Population (2024) | 1,157 |
| Annual growth rate · Trend category | declining |
| Population | 1,157 people (vs Oklahoma 63,420) |
| Population Estimate | 1,107 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 38.0y is 0.9 years younger than the U.S. median (38.9y). Children under 18 make up 22% — near the U.S. share of ~22%.
| Age Summary · Median age | 38.0 years (vs Oklahoma 35.2y) |
|---|---|
| Age Summary · Children Pct | 21.8% |
| Age Summary · Character | family-oriented |
| Age Summary · Total Pop | 1,157 |
| Age Summary · Under 18 | 252 |
| Age Summary · 18 To 34 | 274.0× |
| Age Summary · 35 To 64 | 344.0× |
| Age Summary · 65 Plus | 287 |
| Population under 18 | 252 |
| Median age | 38.0 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 1,157 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.18 (0 = single group, 1 = perfectly even distribution); this is read as relatively homogeneous.
| White residents | 983 |
|---|---|
| Black residents | 13 |
| Hispanic or Latino residents | 98 |
| Diversity Index · Diversity index (Simpson) | 18.4% |
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 3 |
| Diversity Index · Largest group share | 89.9% |
| Black population | 0.6% (vs Oklahoma 5.5%) |
| Hispanic or Latino population | 10.4% (vs Oklahoma 12.3%) |
| White (non-Hispanic) population | 80.3% (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 (8)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS). 1.3% are foreign-born — below the U.S. average of 13.9%. 0% have naturalized to U.S. citizenship.
| Residents born in this state | 932 |
|---|---|
| Residents born in another state | 205 |
| Share born in this state | 80.6% |
| Share born in another state | 19.4% |
| Native-born U.S. citizens | 17.7% |
| Foreign-born residents | 1.3% |
| Naturalized citizens | 0.4% |
| Total foreign-born residents | 1 |
Households & Family Composition
531 households. Averaging 2.1 people each — smaller than the U.S. average of 2.5. 42% are family households — below the U.S. share of ~65%. Of 221 families, 38% are married couples with children.
| Children under 18 | 273 |
|---|---|
| Total families | 221 |
| Married couples with children | 83 |
| Single-parent households | 18 |
| Average household size | 2.11 |
| Women who gave birth (past year) | 8.7% |
| Grandparents living with grandchildren | 11 |
| Grandparents responsible for grandchildren | 4 |
| Family households | 224 households (vs Oklahoma 16,590) |
| Households that are families | 42.2% (vs Oklahoma 61.1%) |
| Total households | 531 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. 14.3% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 118 residents per year on net (IRS migration data).
| Moved within the county (past year) | 14.3% |
|---|---|
| Migration · People moving in (annual) | 7,673 |
| Migration · People moving out (annual) | 7,791 |
| Migration · Net migration (in − out) | -118 |
| 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 | 85 |
|---|---|
| Disability rate | 7.9% |
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. 50 residents live in group quarters (4.3% of population).
| Living in group quarters | 50 |
|---|
Other
| Congressional District · District | 3 |
|---|---|
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 40011 |
| Cdc Birth Rate · State Fips | 40 |
| Cdc Birth Rate · County Fips | 011 |
| Cdc Birth Rate · County | Blaine |
| Cdc Birth Rate · Birth Rate | 35.1% |
| Cdc Birth Rate · Lower Ci | 26.80 |
| Cdc Birth Rate · Upper Ci | 45.10 |
| Cdc Mortality · Fips | 40011 |
| Cdc Mortality · County | Blaine County |
| Cdc Mortality · Urban Rural | Noncore |
| Cdc Mortality · Total Deaths 2020 2023 | 340 |
| Cdc Vaccination · Fips | 40011 |
| Cdc Vaccination · County | Blaine County |
| Cdc Vaccination · Dose1 Pop Pct | 56.1% |
| Cdc Vaccination · Series Complete Pct | 48.4% |
| Cdc Vaccination · Booster Pct | 45.5% |
| Cdc Vaccination · Population 2019 | 9,429 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 2.50 |
| Family Score · Schools | 3 |
| Family Score · Children Pct | 21.8% |
| Family Score · Rating | limited |
| Town Summary · Key Facts | population 1,157, declining, family-oriented, working-class, mixed |
| Town Summary · Population | 1,157 people (vs Oklahoma 63,420) |
| Town Summary · County | Blaine County |
Sources: NCES school congressional district assignment · federal dataset cascade