St. James: Demographics & People
About 4,824 people live in St. James, in 1,654 households. Population grew 5.3% from 4,581 (2022) to 4,824 (2024). Median age 40.9 years. (1.6y older than Maryland). Children under 18 are 27% of the population. Population is 64% White (non-Hispanic) and 13% Hispanic or Latino. The community is moderately diverse (Simpson index 0.43). 73% of households are family-led. County is gaining 2,125 residents per year (2022-2023). County health: 42% adult obesity, 16% smoke.
- 2.9 people per household.
- 27% non-family households (singles, roommates).
Population & Trend
Population grew 5.3% from 4,581 (2022) to 4,824 (2024) — about 8.8× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~5,083 (extrapolated at 2.6%/yr trend). Census Bureau Vintage estimate: 5,441.
| Census data vintage | 2024 |
|---|---|
| Population | 154,705 people |
| Annual growth rate · Population change | 5.3% |
| Annual growth rate · Population (2022) | 4,581 |
| Annual growth rate · Population (2024) | 4,824 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | booming |
| Population | 4,824 people |
| Population Estimate | 5,441 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 40.9y is 2.0 years older than the U.S. median (38.9y). Children under 18 make up 27% — above the U.S. share of ~22%.
| Age Summary · Median age | 40.9 years (vs Maryland 39.3y) |
|---|---|
| Age Summary · Children Pct | 27.3% |
| Age Summary · Character | established |
| Population under 18 | 1,318 |
| Median age | 40.9 years (vs Maryland 39.3y) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Race, Ethnicity & Diversity
Of 4,824 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.43 (0 = single group, 1 = perfectly even distribution); this is read as moderately diverse.
| White residents | 3,004 |
|---|---|
| Black residents | 278 |
| Asian residents | 192 |
| Hispanic or Latino residents | 620 |
| Diversity Index · Diversity index (Simpson) | 43.2% |
| Diversity Index · Diversity label | moderately diverse |
| Diversity Index · Groups counted | 4 |
| Diversity Index · Largest group share | 73.4% |
| Asian population | 2.0% |
| Black population | 10.6% |
| Hispanic or Latino population | 12.7% |
| White (non-Hispanic) population | 64.4% |
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). 5.1% are foreign-born — below the U.S. average of 13.9%. 10% have naturalized to U.S. citizenship.
| Residents born in this state | 2,756 |
|---|---|
| Residents born in another state | 1,324 |
| Share born in this state | 57.1% |
| Share born in another state | 42.9% |
| Native-born U.S. citizens | 27.4% |
| Foreign-born residents | 5.1% |
| Naturalized citizens | 10.3% |
| Total foreign-born residents | 373 |
| From Europe | 9 |
| From Africa | 119 |
Households & Family Composition
1,654 households. Averaging 2.7 people each — larger than the U.S. average of 2.5. 73% are family households — above the U.S. share of ~65%. Of 1,192 families, 46% are married couples with children.
| Children under 18 | 1,226 |
|---|---|
| Total families | 1,192 |
| Married couples with children | 553 |
| Single-parent households | 150 |
| Average household size | 2.72 |
| Women who gave birth (past year) | 5.3% |
| Grandparents living with grandchildren | 48 |
| Family households | 1,203 households |
| Households that are families | 72.7% |
| Total households | 1,654 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. 5.9% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 2,125 residents per year on net (IRS migration data).
| Moved within the county (past year) | 5.9% |
|---|---|
| Migration · People moving in (annual) | 142,000 |
| Migration · People moving out (annual) | 139,875 |
| Migration · Net migration (in − out) | 2,125 |
| 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 | 209 |
|---|---|
| Disability rate | 5.1% |
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. 102 residents live in group quarters (2.1% of population).
| Living in group quarters | 102 |
|---|
Other
| Congressional District · District | 6 |
|---|---|
| Congressional District · Formatted | MD-06 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 24,043 |
| Cdc Birth Rate · State Fips | 24 |
| Cdc Birth Rate · County Fips | 43 |
| Cdc Birth Rate · County | Washington |
| Cdc Birth Rate · Birth Rate | 21.4% |
| Cdc Birth Rate · Lower Ci | 19.30 |
| Cdc Birth Rate · Upper Ci | 23.70 |
| Cdc Mortality · Fips | 24,043 |
| Cdc Mortality · County | Washington County |
| Cdc Mortality · Urban Rural | Medium metro |
| Cdc Mortality · Total Deaths 2020 2023 | 6,845 |
| Cdc Vaccination · Fips | 24,043 |
| Cdc Vaccination · County | Washington County |
| Cdc Vaccination · Dose1 Pop Pct | 69.3% |
| Cdc Vaccination · Series Complete Pct | 62.1% |
| Cdc Vaccination · Booster Pct | 54.7% |
| Cdc Vaccination · Population 2019 | 151,049 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 10 |
| Family Score · Schools | 20 |
| Family Score · Childcare Centers | 1 |
| Family Score · Children Pct | 27.3% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 4,824, booming, established, upper-middle, mixed |
| Town Summary · Population | 4,824 people |
| Town Summary · County | Washington County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade