St. Croix Falls: Demographics & People
About 2,423 people live in St. Croix Falls, in 1,092 households. Population shrank 1.9% from 2,469 (2022) to 2,423 (2024). Median age 43.2 years. (3.5y younger than Polk County; 4.9y older than Wisconsin). Children under 18 are 20% of the population. Population is 90% White (non-Hispanic) and 2% Hispanic or Latino. The community is relatively homogeneous (Simpson index 0.06). 54% of households are family-led. County is gaining 71 residents per year (2022-2023). County health: 40% adult obesity, 21% smoke.
- 2.2 people per household (vs Wisconsin avg 2.4).
- 46% non-family households (singles, roommates) (vs Wisconsin 43%).
- 71 dependents per 100 working-age (youth + seniors / 18-64) (vs Wisconsin 66).
Population & Trend
Population shrank 1.9% from 2,469 (2022) to 2,423 (2024). Estimated 2026 population: ~2,378 (extrapolated at -0.9%/yr trend). Census Bureau Vintage estimate: 2,319.
| Census data vintage | 2024 |
|---|---|
| Population | 44,977 people |
| Annual growth rate · Population change | -1.9% |
| Annual growth rate · Population (2022) | 2,469 |
| Annual growth rate · Population (2024) | 2,423 |
| Annual growth rate · Trend category | declining |
| Population | 2,423 people (vs Wisconsin 25,785) |
| Population Estimate | 2,319 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 43.2y is 4.3 years older than the U.S. median (38.9y). Children under 18 make up 20% — below the U.S. share of ~22%.
| Age Summary · Median age | 43.2 years (vs Wisconsin 38.3y) |
|---|---|
| Age Summary · Children Pct | 19.6% |
| Age Summary · Character | established |
| Age Summary · Total Pop | 2,423 |
| Age Summary · Under 18 | 476 |
| Age Summary · 18 To 34 | 506.0× |
| Age Summary · 35 To 64 | 915.0× |
| Age Summary · 65 Plus | 526 |
| Population under 18 | 476 |
| Median age | 43.2 years (vs Wisconsin 38.3y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 2,423 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.06 (0 = single group, 1 = perfectly even distribution); this is read as relatively homogeneous.
| White residents | 2,261 |
|---|---|
| Asian residents | 16 |
| Hispanic or Latino residents | 53 |
| Diversity Index · Diversity index (Simpson) | 5.8% |
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 3 |
| Diversity Index · Largest group share | 97.0% |
| Asian population | 0.7% (vs Wisconsin 3.1%) |
| Hispanic or Latino population | 2.5% (vs Wisconsin 6.6%) |
| White (non-Hispanic) population | 89.5% (vs Wisconsin 81.6%) |
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). 0.4% are foreign-born — below the U.S. average of 13.9%. 2% have naturalized to U.S. citizenship.
| Residents born in this state | 1,027 |
|---|---|
| Residents born in another state | 1,339 |
| Share born in this state | 42.4% |
| Share born in another state | 57.6% |
| Native-born U.S. citizens | 55.3% |
| Foreign-born residents | 0.4% |
| Naturalized citizens | 2.0% |
| Total foreign-born residents | 16 |
| From Europe | 7 |
| From Africa | 5 |
Households & Family Composition
1,092 households. Averaging 2.3 people each — smaller than the U.S. average of 2.5. 54% are family households — below the U.S. share of ~65%. Of 583 families, 21% are married couples with children.
| Children under 18 | 568 |
|---|---|
| Total families | 583 |
| Married couples with children | 123 |
| Single-parent households | 44 |
| Average household size | 2.26 |
| Women who gave birth (past year) | 15.7% |
| Grandparents living with grandchildren | 5 |
| Family households | 593 households (vs Wisconsin 7,092) |
| Households that are families | 54.3% (vs Wisconsin 57.2%) |
| Total households | 1,092 households (vs Wisconsin 10,843) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 7.3% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 71 residents per year on net (IRS migration data).
| Moved within the county (past year) | 7.3% |
|---|---|
| Migration · People moving in (annual) | 44,098 |
| Migration · People moving out (annual) | 44,027 |
| Migration · Net migration (in − out) | 71 |
| 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 | 142 |
|---|---|
| Disability rate | 6.4% |
Group Quarters
Group quarters are non-household living arrangements counted by the Census — college dormitories, nursing homes, military barracks, group homes, correctional facilities, and similar institutional or shared housing. 80 residents live in group quarters (3.3% of population).
| Living in group quarters | 80 |
|---|
Other
| Congressional District · District | 7 |
|---|---|
| Congressional District · Formatted | WI-07 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 55095 |
| Cdc Birth Rate · State Fips | 55 |
| Cdc Birth Rate · County Fips | 095 |
| Cdc Birth Rate · County | Polk |
| Cdc Birth Rate · Birth Rate | 11.2% |
| Cdc Birth Rate · Lower Ci | 8.80 |
| Cdc Birth Rate · Upper Ci | 14.10 |
| Cdc Mortality · Fips | 55095 |
| Cdc Mortality · County | Polk County |
| Cdc Mortality · Urban Rural | Noncore |
| Cdc Mortality · Total Deaths 2020 2023 | 1,596 |
| Cdc Vaccination · Fips | 55095 |
| Cdc Vaccination · County | Polk County |
| Cdc Vaccination · Dose1 Pop Pct | 58.6% |
| Cdc Vaccination · Series Complete Pct | 53.2% |
| Cdc Vaccination · Booster Pct | 61.8% |
| Cdc Vaccination · Population 2019 | 43,783 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 10 |
| Family Score · Schools | 20 |
| Family Score · Children Pct | 19.6% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 2,423, declining, established, middle-class, mixed |
| Town Summary · Population | 2,423 people (vs Wisconsin 25,785) |
| Town Summary · County | Polk County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade