Kamiah: Demographics & People
Kamiah is home to 1,084 people, in 546 households. Population grew 2.9% from 1,053 (2022) to 1,084 (2024). Median age 53.3 years. (4.3y older than Lewis County; 17.2y older than Idaho). Children under 18 are 16% of the population. Population is 79% White (non-Hispanic) and 7% Hispanic or Latino. The community is somewhat diverse (Simpson index 0.24). 53% of households are family-led. County is gaining 649 residents per year (2022-2023). County health: 33% adult obesity, 18% smoke.
- 2.0 people per household (vs Idaho avg 2.7).
- 47% non-family households (singles, roommates) (vs Idaho 33%).
- 97 dependents per 100 working-age (youth + seniors / 18-64) (vs Idaho 70).
Population & Trend
Population grew 2.9% from 1,053 (2022) to 1,084 (2024) — about 4.9× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~1,116 (extrapolated at 1.5%/yr trend). Census Bureau Vintage estimate: 1,159.
| Census data vintage | 2024 |
|---|---|
| Population | 16,541 people |
| Annual growth rate · Population change | 2.9% |
| Annual growth rate · Population (2022) | 1,053 |
| Annual growth rate · Population (2024) | 1,084 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | growing |
| Population | 1,084 people (vs Idaho 56,447) |
| Population Estimate | 1,159 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 53.3y is 14.4 years older than the U.S. median (38.9y). Children under 18 make up 16% — below the U.S. share of ~22%.
| Age Summary · Median age | 53.3 years (vs Idaho 36.1y) |
|---|---|
| Age Summary · Children Pct | 16.3% |
| Age Summary · Character | retirement community |
| Age Summary · Total Pop | 1,084 |
| Age Summary · Under 18 | 177 |
| Age Summary · 18 To 34 | 142.0× |
| Age Summary · 35 To 64 | 409.0× |
| Age Summary · 65 Plus | 356 |
| Population under 18 | 177 |
| Median age | 53.3 years (vs Idaho 36.1y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 1,084 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.24 (0 = single group, 1 = perfectly even distribution); this is read as somewhat diverse.
| White residents | 806 |
|---|---|
| Black residents | 23 |
| Asian residents | 16 |
| Hispanic or Latino residents | 85 |
| Diversity Index · Diversity index (Simpson) | 24.0% |
| Diversity Index · Diversity label | somewhat diverse |
| Diversity Index · Groups counted | 4 |
| Diversity Index · Largest group share | 86.7% |
| Asian population | 1.6% (vs Idaho 1.1%) |
| Black population | 0.8% (vs Idaho 70.0%) |
| Hispanic or Latino population | 7.1% (vs Idaho 10.5%) |
| White (non-Hispanic) population | 78.6% (vs Idaho 79.5%) |
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). 4.8% are foreign-born — below the U.S. average of 13.9%. 2% have naturalized to U.S. citizenship.
| Residents born in this state | 443 |
|---|---|
| Residents born in another state | 567 |
| Share born in this state | 40.9% |
| Share born in another state | 59.1% |
| Native-born U.S. citizens | 52.3% |
| Foreign-born residents | 4.8% |
| Naturalized citizens | 2.0% |
| Total foreign-born residents | 39 |
| From Africa | 16 |
Households & Family Composition
546 households. Averaging 2.0 people each — smaller than the U.S. average of 2.5. 53% are family households — below the U.S. share of ~65%. Of 258 families, 19% are married couples with children.
| Children under 18 | 174 |
|---|---|
| Total families | 258 |
| Married couples with children | 50 |
| Single-parent households | 10 |
| Average household size | 1.98 |
| Women who gave birth (past year) | 13.7% |
| Grandparents living with grandchildren | 25 |
| Family households | 288 households (vs Idaho 13,756) |
| Households that are families | 52.7% (vs Idaho 66.6%) |
| Total households | 546 households (vs Idaho 21,573) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 9.6% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 649 residents per year on net (IRS migration data).
| Moved within the county (past year) | 9.6% |
|---|---|
| Migration · People moving in (annual) | 15,641 |
| Migration · People moving out (annual) | 14,992 |
| Migration · Net migration (in − out) | 649 |
| 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 | 185 |
|---|---|
| Disability rate | 15.3% |
Other
| Congressional District · District | 1 |
|---|---|
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 16049 |
| Cdc Birth Rate · State Fips | 16 |
| Cdc Birth Rate · County Fips | 049 |
| Cdc Birth Rate · County | Idaho |
| Cdc Birth Rate · Birth Rate | 16.9% |
| Cdc Birth Rate · Lower Ci | 12.10 |
| Cdc Birth Rate · Upper Ci | 22.80 |
| Cdc Mortality · Fips | 16049 |
| Cdc Mortality · County | Idaho County |
| Cdc Mortality · Urban Rural | Noncore |
| Cdc Mortality · Total Deaths 2020 2023 | 627 |
| Cdc Vaccination · Fips | 16049 |
| Cdc Vaccination · County | Idaho County |
| Cdc Vaccination · Dose1 Pop Pct | 35.9% |
| Cdc Vaccination · Series Complete Pct | 31.9% |
| Cdc Vaccination · Booster Pct | 51.7% |
| Cdc Vaccination · Population 2019 | 16,667 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 2.50 |
| Family Score · Schools | 3 |
| Family Score · Children Pct | 16.3% |
| Family Score · Rating | limited |
| Town Summary · Key Facts | population 1,084, growing, retirement community, working-class, mixed |
| Town Summary · Population | 1,084 people (vs Idaho 56,447) |
| Town Summary · County | Idaho County |
Sources: NCES school congressional district assignment · federal dataset cascade