St. Olaf: Demographics & People
St. Olaf's population stands at 76 people, in 39 households. Population grew 1.3% from 75 (2022) to 76 (2024). Median age 51.5 years. (5.1y older than Clayton County; 12.7y older than Iowa). Children under 18 are 9% of the population. Population is 100% White (non-Hispanic). The community is relatively homogeneous (Simpson index 0.00). 69% of households are family-led. County is losing 234 residents per year (2022-2023). County health: 41% adult obesity, 17% smoke.
- 1.9 people per household.
- 31% non-family households (singles, roommates).
Population & Trend
Population grew 1.3% from 75 (2022) to 76 (2024) — about 2.2× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~77 (extrapolated at 0.7%/yr trend). Census Bureau Vintage estimate: 78.
| Census data vintage | 2024 |
|---|---|
| Population | 17,043 people |
| Annual growth rate · Population change | 1.3% |
| Annual growth rate · Population (2022) | 75 |
| Annual growth rate · Population (2024) | 76 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | growing |
| Population | 76 people |
| Population Estimate | 78 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 51.5y is 12.6 years older than the U.S. median (38.9y). Children under 18 make up 9% — below the U.S. share of ~22%.
| Age Summary · Median age | 51.5 years (vs Iowa 38.8y) |
|---|---|
| Age Summary · Children Pct | 9.2% |
| Age Summary · Character | retirement community |
| Population under 18 | 7 |
| Median age | 51.5 years (vs Iowa 38.8y) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Race, Ethnicity & Diversity
Of 76 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 | 75 |
|---|---|
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 1 |
| Diversity Index · Largest group share | 100.0% |
| White (non-Hispanic) population | 100.0% |
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 | 44 |
|---|---|
| Residents born in another state | 32 |
| Share born in this state | 57.9% |
| Share born in another state | 42.1% |
| Native-born U.S. citizens | 42.1% |
| Total foreign-born residents | 328 |
Households & Family Composition
39 households. Averaging 2.0 people each — smaller than the U.S. average of 2.5. 69% are family households — above the U.S. share of ~65%. Of 26 families, 12% are married couples with children.
| Children under 18 | 10 |
|---|---|
| Total families | 26 |
| Married couples with children | 3 |
| Single-parent households | 1 |
| Average household size | 2.03 |
| Women who gave birth (past year) | 10.0% |
| Grandparents living with grandchildren | 139 |
| Grandparents responsible for grandchildren | 46 |
| Family households | 27 households |
| Households that are families | 69.2% |
| Total households | 39 households |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 3.9% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 234 residents per year on net (IRS migration data).
| Lived in same home a year ago | 76.0% |
|---|---|
| Moved within the county (past year) | 3.9% |
| Migration · People moving in (annual) | 16,561 |
| Migration · People moving out (annual) | 16,795 |
| Migration · Net migration (in − out) | -234 |
| 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 | 2 |
|---|---|
| Disability rate | 1.9% |
Other
| Congressional District · District | 2 |
|---|---|
| Congressional District · Formatted | IA-02 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 19,043 |
| Cdc Birth Rate · State Fips | 19 |
| Cdc Birth Rate · County Fips | 43 |
| Cdc Birth Rate · County | Clayton |
| Cdc Birth Rate · Birth Rate | 8.8% |
| Cdc Birth Rate · Lower Ci | 5.90 |
| Cdc Birth Rate · Upper Ci | 12.80 |
| Cdc Mortality · Fips | 19,043 |
| Cdc Mortality · County | Clayton County |
| Cdc Mortality · Urban Rural | Noncore |
| Cdc Mortality · Total Deaths 2020 2023 | 601 |
| Cdc Vaccination · Fips | 19,043 |
| Cdc Vaccination · County | Clayton County |
| Cdc Vaccination · Dose1 Pop Pct | 53.8% |
| Cdc Vaccination · Series Complete Pct | 49.8% |
| Cdc Vaccination · Booster Pct | 57.7% |
| Cdc Vaccination · Population 2019 | 17,549 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 6.50 |
| Family Score · Schools | 11 |
| Family Score · Children Pct | 9.2% |
| Family Score · Rating | good |
| Town Summary · Key Facts | population 76, growing, retirement community, upper-middle, blue collar |
| Town Summary · Population | 76 people |
| Town Summary · County | Clayton County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade