Big Rock: Demographics & People
Big Rock is home to 6 people, in 3 households. Population shrank 50.0% from 12 (2022) to 6 (2024). Median age -666,666,666.00. (666666705.4y younger than Scott County; 666666703.3y younger than Iowa). Population is 100% White (non-Hispanic). 100% of households are family-led. County is losing 183 residents per year (2022-2023). County health: 41% adult obesity, 18% smoke.
- 2.0 people per household (vs Iowa avg 2.4).
- 0% non-family households (singles, roommates) (vs Iowa 43%).
Population & Trend
Population shrank 50.0% from 12 (2022) to 6 (2024). Estimated 2026 population: ~3 (extrapolated at -25.0%/yr trend). Census Bureau Vintage estimate: 1.
| Census data vintage | 2024 |
|---|---|
| Population | 46,460 people |
| Annual growth rate · Population change | -50.0% |
| Annual growth rate · Population (2022) | 12 |
| Annual growth rate · Population (2024) | 6 |
| Annual growth rate · Trend category | shrinking |
| Population | 6 people (vs Iowa 24,827) |
| Population Estimate | 1 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age -666666666.0y is 666666704.9 years younger than the U.S. median (38.9y).
| Age Summary · Median age | 62.1 years (vs Iowa 37.3y) |
|---|---|
| Age Summary · Character | retirement community |
| Age Summary · Total Pop | 6 |
| Age Summary · 35 To 64 | 6.0× |
| Age Summary · Pct 35 To 64 | 100.0% |
| Median age | -666,666,666.00 (vs Iowa 37.3y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 6 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups).
| White residents | 12 |
|---|---|
| White (non-Hispanic) population | 100.0% (vs Iowa 81.2%) |
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 (1)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS).
| Residents born in this state | 3 |
|---|---|
| Residents born in another state | 3 |
| Share born in this state | 50.0% |
| Share born in another state | 50.0% |
| Native-born U.S. citizens | 50.0% |
| Total foreign-born residents | 952 |
Households & Family Composition
3 households. Averaging 1.2 people each — smaller than the U.S. average of 2.5. 100% are family households — above the U.S. share of ~65%. Of 3 families, 0% are married couples with children.
| Total families | 3 |
|---|---|
| Average household size | 1.20 |
| Grandparents living with grandchildren | 825 |
| Grandparents responsible for grandchildren | 331 |
| Family households | 3 households (vs Iowa 6,171) |
| Households that are families | 100.0% (vs Iowa 57.4%) |
| Total households | 3 households (vs Iowa 10,135) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. The surrounding county is losing 183 residents per year on net (IRS migration data).
| Lived in same home a year ago | 6.0% |
|---|---|
| Migration · People moving in (annual) | 42,447 |
| Migration · People moving out (annual) | 42,630 |
| Migration · Net migration (in − out) | -183 |
| Migration · Year | 2022-2023 |
Sources: IRS SOI Migration 2021-2022 · Refreshed 2026-04-12
Other
| Congressional District · District | 1 |
|---|---|
| Congressional District · Formatted | IA-01 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 19045 |
| Cdc Birth Rate · State Fips | 19 |
| Cdc Birth Rate · County Fips | 045 |
| Cdc Birth Rate · County | Clinton |
| Cdc Birth Rate · Birth Rate | 23.7% |
| Cdc Birth Rate · Lower Ci | 20.10 |
| Cdc Birth Rate · Upper Ci | 27.80 |
| Cdc Mortality · Fips | 19045 |
| Cdc Mortality · County | Clinton County |
| Cdc Mortality · Urban Rural | Micropolitan |
| Cdc Mortality · Total Deaths 2020 2023 | 1,885 |
| Cdc Vaccination · Fips | 19045 |
| Cdc Vaccination · County | Clinton County |
| Cdc Vaccination · Dose1 Pop Pct | 62.1% |
| Cdc Vaccination · Series Complete Pct | 56.8% |
| Cdc Vaccination · Booster Pct | 54.4% |
| Cdc Vaccination · Population 2019 | 46,429 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 10 |
| Family Score · Schools | 19 |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 6, shrinking, retirement community, high crime, heritage: German/Eastern Europ |
| Town Summary · Population | 6 people (vs Iowa 24,827) |
| Town Summary · County | Clinton County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade