St. Johns: Demographics & People
About 7,715 people live in St. Johns, in 3,263 households. Population grew 0.0% from 7,712 (2022) to 7,715 (2024). Median age 44.3 years. (2.9y older than Clinton County; 4.0y older than Michigan). Children under 18 are 23% of the population. Population is 90% White (non-Hispanic) and 4% Hispanic or Latino. 59% of households are family-led. County is gaining 317 residents per year (2022-2023). County health: 36% adult obesity, 13% smoke.
- 2.4 people per household.
- 41% non-family households (singles, roommates).
Population & Trend
Population grew 0.0% from 7,712 (2022) to 7,715 (2024) — close to the U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~7,718 (extrapolated at 0.0%/yr trend).
| Census data vintage | 2024 |
|---|---|
| Population | 79,128 people |
| Annual growth rate · Population change | 0.0% |
| Annual growth rate · Population (2022) | 7,712 |
| Annual growth rate · Population (2024) | 7,715 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | stable |
| Population | 7,715 people |
| Population Estimate | 7,722 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 44.3y is 5.4 years older than the U.S. median (38.9y). Children under 18 make up 23% — near the U.S. share of ~22%.
| Age Summary · Median age | 44.3 years (vs Michigan 40.3y) |
|---|---|
| Age Summary · Children Pct | 22.7% |
| Age Summary · Character | established |
| Population under 18 | 1,748 |
| Median age | 44.3 years (vs Michigan 40.3y) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Race, Ethnicity & Diversity
Of 7,715 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups).
| White residents | 7,085 |
|---|---|
| Black residents | 79 |
| Asian residents | 41 |
| Hispanic or Latino residents | 310 |
| Diversity Index · Simpson Index | 15.4% |
| Diversity Index · Interpretation | less diverse |
| Asian population | 0.7% |
| Black population | 1.1% |
| Hispanic or Latino population | 3.7% |
| White (non-Hispanic) population | 89.9% |
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). 0.2% are foreign-born — below the U.S. average of 13.9%. 2% have naturalized to U.S. citizenship.
| Residents born in this state | 6,705 |
|---|---|
| Residents born in another state | 838 |
| Share born in this state | 86.9% |
| Share born in another state | 13.1% |
| Native-born U.S. citizens | 10.9% |
| Foreign-born residents | 0.2% |
| Naturalized citizens | 2.0% |
| Total foreign-born residents | 121 |
| From Europe | 58 |
| From Africa | 20 |
Households & Family Composition
3,263 households. Averaging 2.3 people each — smaller than the U.S. average of 2.5. 59% are family households — below the U.S. share of ~65%. Of 1,945 families, 19% are married couples with children.
| Children under 18 | 1,847 |
|---|---|
| Total families | 1,945 |
| Married couples with children | 376 |
| Single-parent households | 135 |
| Average household size | 2.32 |
| Women who gave birth (past year) | 16.0% |
| Grandparents living with grandchildren | 268 |
| Grandparents responsible for grandchildren | 97 |
| Family households | 1,927 households |
| Households that are families | 59.1% |
| Total households | 3,263 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. 13.4% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 317 residents per year on net (IRS migration data).
| Moved within the county (past year) | 13.4% |
|---|---|
| Migration · People moving in (annual) | 79,892 |
| Migration · People moving out (annual) | 79,575 |
| Migration · Net migration (in − out) | 317 |
| 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 | 414 |
|---|---|
| Disability rate | 5.6% |
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. 259 residents live in group quarters (3.4% of population).
| Living in group quarters | 259 |
|---|
Other
| Congressional District · District | 7 |
|---|---|
| Congressional District · Formatted | MI-07 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 26,037 |
| Cdc Birth Rate · State Fips | 26 |
| Cdc Birth Rate · County Fips | 37 |
| Cdc Birth Rate · County | Clinton |
| Cdc Birth Rate · Birth Rate | 7.6% |
| Cdc Birth Rate · Lower Ci | 6.10 |
| Cdc Birth Rate · Upper Ci | 9.30 |
| Cdc Mortality · Fips | 26,037 |
| Cdc Mortality · County | Clinton County |
| Cdc Mortality · Urban Rural | Medium metro |
| Cdc Mortality · Total Deaths 2020 2023 | 1,672 |
| Cdc Vaccination · Fips | 26,037 |
| Cdc Vaccination · County | Clinton County |
| Cdc Vaccination · Dose1 Pop Pct | 60.0% |
| Cdc Vaccination · Series Complete Pct | 59.7% |
| Cdc Vaccination · Booster Pct | 64.9% |
| Cdc Vaccination · Population 2019 | 79,595 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 10 |
| Family Score · Schools | 20 |
| Family Score · Childcare Centers | 4 |
| Family Score · Children Pct | 22.7% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 7,715, stable, established, middle-class, mixed |
| Town Summary · Population | 7,715 people |
| Town Summary · County | Clinton County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade