St. Marys: Demographics & People
About 19,166 people live in St. Marys, in 7,415 households. Population grew 1.9% from 18,805 (2022) to 19,166 (2024). Median age 33.8 years. (0.9y younger than Camden County; 1.8y younger than Georgia). Children under 18 are 26% of the population. Population is 70% White (non-Hispanic) and 14% Black. 71% of households are family-led. County is gaining 1,463 residents per year (2022-2023). County health: 38% adult obesity, 18% smoke.
- 2.6 people per household (vs Georgia avg 2.6).
- 29% non-family households (singles, roommates) (vs Georgia 40%).
- 77 dependents per 100 working-age (youth + seniors / 18-64) (vs Georgia 62).
Population & Trend
Population grew 1.9% from 18,805 (2022) to 19,166 (2024) — about 3.2× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~19,535 (extrapolated at 1.0%/yr trend). Census Bureau Vintage estimate: 20,035.
| Census data vintage | 2024 |
|---|---|
| Population | 54,768 people |
| Annual growth rate · Population change | 1.9% |
| Annual growth rate · Population (2022) | 18,805 |
| Annual growth rate · Population (2024) | 19,166 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | growing |
| Population | 19,166 people (vs Georgia 37,381) |
| Population Estimate | 20,035 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 33.8y is 5.1 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 | 33.8 years (vs Georgia 35.6y) |
|---|---|
| Age Summary · Children Pct | 26.5% |
| Age Summary · Character | young professional |
| Age Summary · Total Pop | 19,166 |
| Age Summary · Under 18 | 5,085 |
| Age Summary · 18 To 34 | 4,945.0× |
| Age Summary · 35 To 64 | 5,886.0× |
| Age Summary · 65 Plus | 3,250 |
| Population under 18 | 5,085 |
| Median age | 33.8 years (vs Georgia 35.6y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 19,166 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups).
| White residents | 13,716 |
|---|---|
| Black residents | 2,919 |
| Asian residents | 292 |
| Hispanic or Latino residents | 1,389 |
| Diversity Index · Simpson Index | 45.7% |
| Diversity Index · Interpretation | moderately diverse |
| Asian population | 1.6% (vs Georgia 2.6%) |
| Black population | 14.5% (vs Georgia 40.5%) |
| Hispanic or Latino population | 8.4% (at Georgia median) |
| White (non-Hispanic) population | 70.2% (vs Georgia 38.1%) |
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). 2.7% are foreign-born — below the U.S. average of 13.9%. 3% have naturalized to U.S. citizenship.
| Residents born in this state | 6,305 |
|---|---|
| Residents born in another state | 11,796 |
| Share born in this state | 32.9% |
| Share born in another state | 67.1% |
| Native-born U.S. citizens | 61.5% |
| Foreign-born residents | 2.7% |
| Naturalized citizens | 2.8% |
| Total foreign-born residents | 604 |
| From Europe | 100 |
| From Africa | 224 |
Households & Family Composition
7,415 households. Averaging 2.5 people each — matches the U.S. average of 2.5. 71% are family households — above the U.S. share of ~65%. Of 5,358 families, 19% are married couples with children.
| Children under 18 | 4,924 |
|---|---|
| Total families | 5,358 |
| Married couples with children | 1,029 |
| Single-parent households | 310 |
| Average household size | 2.47 |
| Women who gave birth (past year) | 16.9% |
| Grandparents living with grandchildren | 391 |
| Grandparents responsible for grandchildren | 225 |
| Family households | 5,255 households (vs Georgia 8,896) |
| Households that are families | 70.9% (vs Georgia 60.1%) |
| Total households | 7,415 households (vs Georgia 14,704) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 16.1% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 1,463 residents per year on net (IRS migration data).
| Moved within the county (past year) | 16.1% |
|---|---|
| Migration · People moving in (annual) | 58,030 |
| Migration · People moving out (annual) | 56,567 |
| Migration · Net migration (in − out) | 1,463 |
| 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 | 1,919 |
|---|---|
| Disability rate | 10.8% |
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. 97 residents live in group quarters (0.5% of population).
| Living in group quarters | 97 |
|---|
Other
| Congressional District · District | 1 |
|---|---|
| Congressional District · Formatted | GA-01 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 13039 |
| Cdc Birth Rate · State Fips | 13 |
| Cdc Birth Rate · County Fips | 039 |
| Cdc Birth Rate · County | Camden |
| Cdc Birth Rate · Birth Rate | 21.7% |
| Cdc Birth Rate · Lower Ci | 18.40 |
| Cdc Birth Rate · Upper Ci | 25.40 |
| Cdc Mortality · Fips | 13039 |
| Cdc Mortality · County | Camden County |
| Cdc Mortality · Urban Rural | Micropolitan |
| Cdc Mortality · Total Deaths 2020 2023 | 1,047 |
| Cdc Vaccination · Fips | 13039 |
| Cdc Vaccination · County | Camden County |
| Cdc Vaccination · Dose1 Pop Pct | 68.5% |
| Cdc Vaccination · Series Complete Pct | 58.2% |
| Cdc Vaccination · Booster Pct | 35.5% |
| Cdc Vaccination · Population 2019 | 54,666 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 6.30 |
| Family Score · Schools | 7 |
| Family Score · Childcare Centers | 6 |
| Family Score · Children Pct | 26.5% |
| Family Score · Rating | good |
| Town Summary · Key Facts | population 19,166, growing, young professional, middle-class, mixed |
| Town Summary · Population | 19,166 people (vs Georgia 37,381) |
| Town Summary · County | Camden County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade