Johnstown: Demographics & People
Census counts 18,883 people in Johnstown, in 7,014 households. Population grew 4.5% from 18,075 (2022) to 18,883 (2024). Median age 34.9 years. (0.8y younger than Colorado). Children under 18 are 26% of the population. Population is 73% White (non-Hispanic) and 20% Hispanic or Latino. The community is somewhat diverse (Simpson index 0.33). 73% of households are family-led. County is gaining 2,575 residents per year (2022-2023). County health: 21% adult obesity, 9% smoke.
- 2.7 people per household (vs Colorado avg 2.5).
- 27% non-family households (singles, roommates) (vs Colorado 38%).
- 54 dependents per 100 working-age (youth + seniors / 18-64) (vs Colorado 58).
Population & Trend
Population grew 4.5% from 18,075 (2022) to 18,883 (2024) — about 7.5× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~19,736 (extrapolated at 2.2%/yr trend). Census Bureau Vintage estimate: 20,911.
| Census data vintage | 2024 |
|---|---|
| Population | 359,066 people |
| Annual growth rate · Population change | 4.5% |
| Annual growth rate · Population (2022) | 18,075 |
| Annual growth rate · Population (2024) | 18,883 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | growing |
| Population | 18,883 people (vs Colorado 108,201) |
| Population Estimate | 20,911 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 34.9y is 4.0 years younger than the U.S. median (38.9y). Children under 18 make up 26% — above the U.S. share of ~22%.
| Age Summary · Median age | 34.9 years (vs Colorado 35.7y) |
|---|---|
| Age Summary · Children Pct | 25.9% |
| Age Summary · Character | young professional |
| Age Summary · Total Pop | 18,883 |
| Age Summary · Under 18 | 4,889 |
| Age Summary · 18 To 34 | 4,599.0× |
| Age Summary · 35 To 64 | 7,643.0× |
| Age Summary · 65 Plus | 1,752 |
| Population under 18 | 4,889 |
| Median age | 34.9 years (vs Colorado 35.7y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 18,883 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.33 (0 = single group, 1 = perfectly even distribution); this is read as somewhat diverse.
| White residents | 14,581 |
|---|---|
| Black residents | 84 |
| Asian residents | 153 |
| Hispanic or Latino residents | 3,583 |
| Diversity Index · Diversity index (Simpson) | 33.4% |
| Diversity Index · Diversity label | somewhat diverse |
| Diversity Index · Groups counted | 4 |
| Diversity Index · Largest group share | 79.2% |
| Asian population | 1.5% (vs Colorado 3.3%) |
| Black population | 0.7% (vs Colorado 2.0%) |
| Hispanic or Latino population | 20.0% (vs Colorado 22.6%) |
| White (non-Hispanic) population | 73.3% (vs Colorado 65.2%) |
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). 0.8% are foreign-born — below the U.S. average of 13.9%. 5% have naturalized to U.S. citizenship.
| Residents born in this state | 9,345 |
|---|---|
| Residents born in another state | 8,419 |
| Share born in this state | 49.5% |
| Share born in another state | 50.5% |
| Native-born U.S. citizens | 44.6% |
| Foreign-born residents | 0.8% |
| Naturalized citizens | 5.1% |
| Total foreign-born residents | 801 |
| From Europe | 52 |
| From Africa | 154 |
Households & Family Composition
7,014 households. Averaging 2.7 people each — larger than the U.S. average of 2.5. 73% are family households — above the U.S. share of ~65%. Of 4,839 families, 45% are married couples with children.
| Children under 18 | 4,692 |
|---|---|
| Total families | 4,839 |
| Married couples with children | 2,168 |
| Single-parent households | 129 |
| Average household size | 2.74 |
| Women who gave birth (past year) | 8.5% |
| Grandparents living with grandchildren | 78 |
| Grandparents responsible for grandchildren | 32 |
| Family households | 5,115 households (vs Colorado 26,135) |
| Households that are families | 72.9% (vs Colorado 62.3%) |
| Total households | 7,014 households (vs Colorado 42,233) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 13.8% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 2,575 residents per year on net (IRS migration data).
| Moved within the county (past year) | 13.8% |
|---|---|
| Migration · People moving in (annual) | 352,656 |
| Migration · People moving out (annual) | 350,081 |
| Migration · Net migration (in − out) | 2,575 |
| 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 | 834 |
|---|---|
| Disability rate | 4.9% |
Other
| Congressional District · District | 804 |
|---|---|
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 08069 |
| Cdc Birth Rate · State Fips | 08 |
| Cdc Birth Rate · County Fips | 069 |
| Cdc Birth Rate · County | Larimer |
| Cdc Birth Rate · Birth Rate | 6.9% |
| Cdc Birth Rate · Lower Ci | 6.20 |
| Cdc Birth Rate · Upper Ci | 7.70 |
| Cdc Mortality · Fips | 08069 |
| Cdc Mortality · County | Larimer County |
| Cdc Mortality · Urban Rural | Medium metro |
| Cdc Mortality · Total Deaths 2020 2023 | 10,649 |
| Cdc Vaccination · Fips | 08069 |
| Cdc Vaccination · County | Larimer County |
| Cdc Vaccination · Dose1 Pop Pct | 79.3% |
| Cdc Vaccination · Series Complete Pct | 71.4% |
| Cdc Vaccination · Booster Pct | 63.2% |
| Cdc Vaccination · Population 2019 | 356,899 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 4.90 |
| Family Score · Schools | 4 |
| Family Score · Childcare Centers | 3 |
| Family Score · Youth Sports Orgs | 2 |
| Family Score · Children Pct | 25.9% |
| Family Score · Rating | fair |
| Town Summary · Key Facts | population 18,883, growing, young professional, affluent, mixed |
| Town Summary · Population | 18,883 people (vs Colorado 108,201) |
| Town Summary · County | Larimer County |
Sources: NCES school congressional district assignment · federal dataset cascade