Calvin: Demographics & People
Census counts 353 people in Calvin, in 117 households. Population shrank 5.6% from 374 (2022) to 353 (2024). Median age 28.4 years. (10.4y younger than Hughes County; 6.8y younger than Oklahoma). Children under 18 are 36% of the population. Population is 68% White (non-Hispanic) and 5% Hispanic or Latino. The community is relatively homogeneous (Simpson index 0.20). 78% of households are family-led. County is gaining 341 residents per year (2022-2023). County health: 48% adult obesity, 22% smoke.
- 3.0 people per household (vs Oklahoma avg 2.6).
- 22% non-family households (singles, roommates) (vs Oklahoma 39%).
- 82 dependents per 100 working-age (youth + seniors / 18-64) (vs Oklahoma 67).
Population & Trend
Population shrank 5.6% from 374 (2022) to 353 (2024). Estimated 2026 population: ~333 (extrapolated at -2.8%/yr trend). Census Bureau Vintage estimate: 308.
| Census data vintage | 2024 |
|---|---|
| Population | 13,367 people |
| Annual growth rate · Population change | -5.6% |
| Annual growth rate · Population (2022) | 374 |
| Annual growth rate · Population (2024) | 353 |
| Annual growth rate · Trend category | shrinking |
| Population | 353 people (vs Oklahoma 63,420) |
| Population Estimate | 308 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 28.4y is 10.5 years younger than the U.S. median (38.9y). Children under 18 make up 36% — above the U.S. share of ~22%.
| Age Summary · Median age | 28.4 years (vs Oklahoma 35.2y) |
|---|---|
| Age Summary · Children Pct | 36.0% |
| Age Summary · Character | young community |
| Age Summary · Total Pop | 353 |
| Age Summary · Under 18 | 127 |
| Age Summary · 18 To 34 | 75.0× |
| Age Summary · 35 To 64 | 119.0× |
| Age Summary · 65 Plus | 32 |
| Population under 18 | 127 |
| Median age | 28.4 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 353 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.20 (0 = single group, 1 = perfectly even distribution); this is read as relatively homogeneous.
| White residents | 267 |
|---|---|
| Black residents | 10 |
| Hispanic or Latino residents | 22 |
| Diversity Index · Diversity index (Simpson) | 19.6% |
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 3 |
| Diversity Index · Largest group share | 89.3% |
| Hispanic or Latino population | 4.8% (vs Oklahoma 12.3%) |
| White (non-Hispanic) population | 67.7% (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 (7)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS).
| Residents born in this state | 259 |
|---|---|
| Residents born in another state | 94 |
| Share born in this state | 73.4% |
| Share born in another state | 26.6% |
| Native-born U.S. citizens | 26.6% |
| Total foreign-born residents | 2 |
Households & Family Composition
117 households. Averaging 3.1 people each — larger than the U.S. average of 2.5. 78% are family households — above the U.S. share of ~65%. Of 92 families, 32% are married couples with children.
| Children under 18 | 135 |
|---|---|
| Total families | 92 |
| Married couples with children | 29 |
| Single-parent households | 6 |
| Average household size | 3.09 |
| Women who gave birth (past year) | 15.2% |
| Grandparents living with grandchildren | 8 |
| Grandparents responsible for grandchildren | 6 |
| Family households | 91 households (vs Oklahoma 16,590) |
| Households that are families | 77.8% (vs Oklahoma 61.1%) |
| Total households | 117 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. 1.2% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 341 residents per year on net (IRS migration data).
| Moved within the county (past year) | 1.2% |
|---|---|
| Migration · People moving in (annual) | 10,182 |
| Migration · People moving out (annual) | 9,841 |
| Migration · Net migration (in − out) | 341 |
| 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 | 37 |
|---|---|
| Disability rate | 9.0% |
Other
| Congressional District · District | 2 |
|---|---|
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 40063 |
| Cdc Birth Rate · State Fips | 40 |
| Cdc Birth Rate · County Fips | 063 |
| Cdc Birth Rate · County | Hughes |
| Cdc Birth Rate · Birth Rate | 52.0% |
| Cdc Birth Rate · Lower Ci | 42.10 |
| Cdc Birth Rate · Upper Ci | 63.40 |
| Cdc Mortality · Fips | 40063 |
| Cdc Mortality · County | Hughes County |
| Cdc Mortality · Urban Rural | Noncore |
| Cdc Mortality · Total Deaths 2020 2023 | 547 |
| Cdc Vaccination · Fips | 40063 |
| Cdc Vaccination · County | Hughes County |
| Cdc Vaccination · Dose1 Pop Pct | 56.4% |
| Cdc Vaccination · Series Complete Pct | 48.1% |
| Cdc Vaccination · Booster Pct | 41.8% |
| Cdc Vaccination · Population 2019 | 13,279 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 2.30 |
| Family Score · Schools | 2 |
| Family Score · Childcare Centers | 1 |
| Family Score · Children Pct | 36.0% |
| Family Score · Rating | limited |
| Town Summary · Key Facts | population 353, shrinking, young community, middle-class, blue collar |
| Town Summary · Population | 353 people (vs Oklahoma 63,420) |
| Town Summary · County | Hughes County |
Sources: NCES school congressional district assignment · federal dataset cascade