Jefferson: Demographics & People
Census counts 7 people in Jefferson, in 4 households. Population shrank 12.5% from 8 (2022) to 7 (2024). Median age 72.3 years. (29.1y older than Grant County; 37.1y older than Oklahoma). Population is 100% White (non-Hispanic). 25% of households are family-led. County health: 45% adult obesity, 22% smoke.
- 1.8 people per household (vs Oklahoma avg 2.6).
- 75% non-family households (singles, roommates) (vs Oklahoma 39%).
Population & Trend
Population shrank 12.5% from 8 (2022) to 7 (2024). Estimated 2026 population: ~6 (extrapolated at -6.2%/yr trend). Census Bureau Vintage estimate: 5.
| Census data vintage | 2024 |
|---|---|
| Population | 4,169 people |
| Annual growth rate · Population change | -12.5% |
| Annual growth rate · Population (2022) | 8 |
| Annual growth rate · Population (2024) | 7 |
| Annual growth rate · Trend category | shrinking |
| Population | 7 people (vs Oklahoma 63,420) |
| Population Estimate | 5 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 72.3y is 33.4 years older than the U.S. median (38.9y).
| Age Summary · Median age | 72.3 years (vs Oklahoma 35.2y) |
|---|---|
| Age Summary · Character | retirement community |
| Age Summary · Total Pop | 7 |
| Age Summary · 65 Plus | 7 |
| Age Summary · Pct 65 Plus | 100.0% |
| Median age | 72.3 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 7 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups).
| White residents | 8 |
|---|---|
| Diversity Index · Simpson Index | -0.31 |
| Diversity Index · Interpretation | less diverse |
| White (non-Hispanic) population | 100.0% (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 (2)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS).
| Residents born in this state | 3 |
|---|---|
| Residents born in another state | 4 |
| Share born in this state | 42.9% |
| Share born in another state | 57.1% |
| Native-born U.S. citizens | 57.1% |
| Total foreign-born residents | 12 |
Households & Family Composition
4 households. Averaging 2.0 people each — smaller than the U.S. average of 2.5. 25% are family households — below the U.S. share of ~65%. Of 1 families, 0% are married couples with children.
| Total families | 1 |
|---|---|
| Average household size | 2.00 |
| Grandparents living with grandchildren | 73 |
| Grandparents responsible for grandchildren | 20 |
| Family households | 1 households (vs Oklahoma 16,590) |
| Households that are families | 25.0% (vs Oklahoma 61.1%) |
| Total households | 4 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.
| Lived in same home a year ago | 7.0% |
|---|---|
| Migration · People moving in (annual) | 3,540 |
| Migration · People moving out (annual) | 3,565 |
| Migration · Net migration (in − out) | -25 |
| Migration · Year | 2022-2023 |
Sources: IRS SOI Migration 2021-2022 · Refreshed 2026-04-12
Other
| Congressional District · District | 3 |
|---|---|
| Congressional District · Formatted | OK-03 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 40053 |
| Cdc Birth Rate · State Fips | 40 |
| Cdc Birth Rate · County Fips | 053 |
| Cdc Birth Rate · County | Grant |
| Cdc Birth Rate · Birth Rate | 25.6% |
| Cdc Birth Rate · Lower Ci | 15.80 |
| Cdc Birth Rate · Upper Ci | 39.30 |
| Cdc Mortality · Fips | 40053 |
| Cdc Mortality · County | Grant County |
| Cdc Mortality · Urban Rural | Noncore |
| Cdc Mortality · Total Deaths 2020 2023 | 144 |
| Cdc Vaccination · Fips | 40053 |
| Cdc Vaccination · County | Grant County |
| Cdc Vaccination · Dose1 Pop Pct | 50.7% |
| Cdc Vaccination · Series Complete Pct | 43.6% |
| Cdc Vaccination · Booster Pct | 42.4% |
| Cdc Vaccination · Population 2019 | 4,333 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 4.50 |
| Family Score · Schools | 7 |
| Family Score · Rating | fair |
| Town Summary · Key Facts | population 7, shrinking, retirement community, high crime, heritage: Irish/English |
| Town Summary · Population | 7 people (vs Oklahoma 63,420) |
| Town Summary · County | Grant County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade