Fort Peck: Demographics & People
Census counts 280 people in Fort Peck, in 108 households. Population grew 27.9% from 219 (2022) to 280 (2024). Median age 48.8 years. (4.5y older than Valley County; 10.0y older than Montana). Children under 18 are 24% of the population. Population is 89% White (non-Hispanic). The community is relatively homogeneous (Simpson index 0.00). 80% of households are family-led. County is losing 118 residents per year (2022-2023). County health: 34% adult obesity, 20% smoke.
- 2.6 people per household (vs Montana avg 2.4).
- 20% non-family households (singles, roommates) (vs Montana 45%).
- 109 dependents per 100 working-age (youth + seniors / 18-64) (vs Montana 70).
Population & Trend
Population grew 27.9% from 219 (2022) to 280 (2024) — about 46.4× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~363 (extrapolated at 13.9%/yr trend). Census Bureau Vintage estimate: 496.
| Census data vintage | 2024 |
|---|---|
| Population | 823 people |
| Annual growth rate · Population change | 27.9% |
| Annual growth rate · Population (2022) | 219 |
| Annual growth rate · Population (2024) | 280 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | booming |
| Population | 280 people (vs Montana 28,504) |
| Population Estimate | 496 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 48.8y is 9.9 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 | 48.8 years (vs Montana 38.8y) |
|---|---|
| Age Summary · Children Pct | 24.3% |
| Age Summary · Character | established |
| Age Summary · Total Pop | 280 |
| Age Summary · Under 18 | 68 |
| Age Summary · 18 To 34 | 10.0× |
| Age Summary · 35 To 64 | 124.0× |
| Age Summary · 65 Plus | 78 |
| Population under 18 | 68 |
| Median age | 48.8 years (vs Montana 38.8y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 280 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 | 200 |
|---|---|
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 1 |
| Diversity Index · Largest group share | 100.0% |
| White (non-Hispanic) population | 88.9% (vs Montana 84.8%) |
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 (6)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS).
| Residents born in this state | 169 |
|---|---|
| Residents born in another state | 111 |
| Share born in this state | 60.4% |
| Share born in another state | 39.6% |
| Native-born U.S. citizens | 39.6% |
| Total foreign-born residents | 11 |
Households & Family Composition
108 households. Averaging 2.3 people each — smaller than the U.S. average of 2.5. 80% are family households — above the U.S. share of ~65%. Of 65 families, 38% are married couples with children.
| Children under 18 | 53 |
|---|---|
| Total families | 65 |
| Married couples with children | 25 |
| Average household size | 2.28 |
| Family households | 86 households (vs Montana 6,314) |
| Households that are families | 79.6% (vs Montana 55.2%) |
| Total households | 108 households (vs Montana 11,795) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 3.2% 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) | 3.2% |
|---|---|
| Migration · People moving in (annual) | 698 |
| Migration · People moving out (annual) | 816 |
| 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 | 18 |
|---|---|
| Disability rate | 9.0% |
Other
| Congressional District · District | 2 |
|---|---|
| Congressional District · Formatted | MT-02 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 30037 |
| Cdc Birth Rate · State Fips | 30 |
| Cdc Birth Rate · County Fips | 037 |
| Cdc Birth Rate · County | Golden Valley |
| Cdc Birth Rate · Birth Rate | 7.4% |
| Cdc Birth Rate · Lower Ci | 1.00 |
| Cdc Birth Rate · Upper Ci | 26.30 |
| Cdc Mortality · Fips | 30037 |
| Cdc Mortality · County | Golden Valley County |
| Cdc Mortality · Urban Rural | Small metro |
| Cdc Mortality · Total Deaths 2020 2023 | 34 |
| Cdc Vaccination · Fips | 30037 |
| Cdc Vaccination · County | Golden Valley County |
| Cdc Vaccination · Dose1 Pop Pct | 54.7% |
| Cdc Vaccination · Series Complete Pct | 48.0% |
| Cdc Vaccination · Booster Pct | 44.9% |
| Cdc Vaccination · Population 2019 | 821 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 10 |
| Family Score · Schools | 20 |
| Family Score · Children Pct | 24.3% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 280, booming, established, upper-middle, mixed |
| Town Summary · Population | 280 people (vs Montana 28,504) |
| Town Summary · County | Golden Valley County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade