Fairfield: Demographics & People
Fairfield's population stands at 690 people, in 209 households. Population grew 6.8% from 646 (2022) to 690 (2024). Median age 40.4 years. (2.5y older than Adair County; 5.2y older than Oklahoma). Children under 18 are 24% of the population. Population is 33% White (non-Hispanic) and 3% Hispanic or Latino. 84% of households are family-led. County is gaining 402 residents per year (2022-2023). County health: 44% adult obesity, 26% smoke.
- 3.3 people per household (vs Oklahoma avg 2.6).
- 16% non-family households (singles, roommates) (vs Oklahoma 39%).
- 56 dependents per 100 working-age (youth + seniors / 18-64) (vs Oklahoma 67).
Population & Trend
Population grew 6.8% from 646 (2022) to 690 (2024) — about 11.3× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~737 (extrapolated at 3.4%/yr trend). Census Bureau Vintage estimate: 804.
| Census data vintage | 2024 |
|---|---|
| Population | 19,495 people |
| Annual growth rate · Population change | 6.8% |
| Annual growth rate · Population (2022) | 646 |
| Annual growth rate · Population (2024) | 690 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | booming |
| Population | 690 people (vs Oklahoma 63,420) |
| Population Estimate | 804 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 40.4y is 1.5 years older than the U.S. median (38.9y). Children under 18 make up 24% — above the U.S. share of ~22%.
| Age Summary · Median age | 40.4 years (vs Oklahoma 35.2y) |
|---|---|
| Age Summary · Children Pct | 24.3% |
| Age Summary · Character | established |
| Age Summary · Total Pop | 690 |
| Age Summary · Under 18 | 168 |
| Age Summary · 18 To 34 | 150.0× |
| Age Summary · 35 To 64 | 291.0× |
| Age Summary · 65 Plus | 81 |
| Population under 18 | 168 |
| Median age | 40.4 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 690 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups).
| White residents | 187 |
|---|---|
| Asian residents | 1 |
| Hispanic or Latino residents | 21 |
| Diversity Index · Simpson Index | 44.0% |
| Diversity Index · Interpretation | moderately diverse |
| Asian population | 0.1% (vs Oklahoma 3.2%) |
| Hispanic or Latino population | 3.0% (vs Oklahoma 12.3%) |
| White (non-Hispanic) population | 33.3% (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 (7)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS).
| Residents born in this state | 455 |
|---|---|
| Residents born in another state | 227 |
| Share born in this state | 65.9% |
| Share born in another state | 34.1% |
| Native-born U.S. citizens | 32.9% |
| Naturalized citizens | 1.2% |
| Total foreign-born residents | 8 |
| From Africa | 2 |
Households & Family Composition
209 households. Averaging 3.6 people each — larger than the U.S. average of 2.5. 84% are family households — above the U.S. share of ~65%. Of 142 families, 27% are married couples with children.
| Children under 18 | 177 |
|---|---|
| Total families | 142 |
| Married couples with children | 38 |
| Single-parent households | 4 |
| Average household size | 3.57 |
| Women who gave birth (past year) | 1.8% |
| Grandparents living with grandchildren | 23 |
| Grandparents responsible for grandchildren | 18 |
| Family households | 175 households (vs Oklahoma 16,590) |
| Households that are families | 83.7% (vs Oklahoma 61.1%) |
| Total households | 209 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. 12.2% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 402 residents per year on net (IRS migration data).
| Moved within the county (past year) | 12.2% |
|---|---|
| Migration · People moving in (annual) | 17,927 |
| Migration · People moving out (annual) | 17,525 |
| Migration · Net migration (in − out) | 402 |
| 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 | 55 |
|---|---|
| Disability rate | 10.3% |
Other
| Congressional District · District | 2 |
|---|---|
| Congressional District · Formatted | OK-02 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 40001 |
| Cdc Birth Rate · State Fips | 40 |
| Cdc Birth Rate · County Fips | 001 |
| Cdc Birth Rate · County | Adair |
| Cdc Birth Rate · Birth Rate | 48.7% |
| Cdc Birth Rate · Lower Ci | 41.60 |
| Cdc Birth Rate · Upper Ci | 56.50 |
| Cdc Mortality · Fips | 40001 |
| Cdc Mortality · County | Adair County |
| Cdc Mortality · Urban Rural | Noncore |
| Cdc Mortality · Total Deaths 2020 2023 | 653 |
| Cdc Vaccination · Fips | 40001 |
| Cdc Vaccination · County | Adair County |
| Cdc Vaccination · Dose1 Pop Pct | 56.5% |
| Cdc Vaccination · Series Complete Pct | 38.6% |
| Cdc Vaccination · Booster Pct | 34.6% |
| Cdc Vaccination · Population 2019 | 22,194 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 9.00 |
| Family Score · Schools | 16 |
| Family Score · Children Pct | 24.3% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 690, booming, established, upper-middle, mixed |
| Town Summary · Population | 690 people (vs Oklahoma 63,420) |
| Town Summary · County | Adair County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade