Leonardtown: Demographics & People
Leonardtown is home to 4,808 people, in 1,578 households. Population grew 2.0% from 4,712 (2022) to 4,808 (2024). Median age 38.3 years. (1.1y older than St. Mary's County; 1.0y younger than Maryland). Children under 18 are 30% of the population. Population is 69% White (non-Hispanic) and 14% Hispanic or Latino. The community is moderately diverse (Simpson index 0.46). 67% of households are family-led. County health: 35% adult obesity, 13% smoke.
- 3.0 people per household.
- 33% non-family households (singles, roommates).
Population & Trend
Population grew 2.0% from 4,712 (2022) to 4,808 (2024) — about 3.4× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~4,906 (extrapolated at 1.0%/yr trend). Census Bureau Vintage estimate: 5,040.
| Census data vintage | 2024 |
|---|---|
| Population | 113,777 people |
| Annual growth rate · Population change | 2.0% |
| Annual growth rate · Population (2022) | 4,712 |
| Annual growth rate · Population (2024) | 4,808 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | growing |
| Population | 4,808 people |
| Population Estimate | 5,040 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 38.3y is 0.6 years younger than the U.S. median (38.9y). Children under 18 make up 30% — above the U.S. share of ~22%.
| Age Summary · Median age | 38.3 years (vs Maryland 39.3y) |
|---|---|
| Age Summary · Children Pct | 29.8% |
| Age Summary · Character | family-oriented |
| Population under 18 | 1,431 |
| Median age | 38.3 years (vs Maryland 39.3y) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Race, Ethnicity & Diversity
Of 4,808 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.46 (0 = single group, 1 = perfectly even distribution); this is read as moderately diverse.
| White residents | 3,352 |
|---|---|
| Black residents | 452 |
| Asian residents | 172 |
| Hispanic or Latino residents | 724 |
| Diversity Index · Diversity index (Simpson) | 45.7% |
| Diversity Index · Diversity label | moderately diverse |
| Diversity Index · Groups counted | 4 |
| Diversity Index · Largest group share | 71.3% |
| Asian population | 3.7% |
| Black population | 11.0% |
| Hispanic or Latino population | 13.9% |
| White (non-Hispanic) population | 68.9% |
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). 1.6% are foreign-born — below the U.S. average of 13.9%. 10% have naturalized to U.S. citizenship.
| Residents born in this state | 1,895 |
|---|---|
| Residents born in another state | 2,358 |
| Share born in this state | 39.4% |
| Share born in another state | 60.6% |
| Native-born U.S. citizens | 49.0% |
| Foreign-born residents | 1.6% |
| Naturalized citizens | 9.9% |
| Total foreign-born residents | 604 |
| From Europe | 312 |
| From Asia | 10 |
| From Africa | 238 |
| From Latin America | 55 |
Households & Family Composition
1,578 households. Averaging 2.7 people each — larger than the U.S. average of 2.5. 67% are family households — near the U.S. share of ~65%. Of 918 families, 72% are married couples with children.
| Children under 18 | 1,350 |
|---|---|
| Total families | 918 |
| Married couples with children | 659 |
| Average household size | 2.73 |
| Women who gave birth (past year) | 3.4% |
| Grandparents living with grandchildren | 133 |
| Grandparents responsible for grandchildren | 35 |
| Family households | 1,055 households |
| Households that are families | 66.9% |
| Total households | 1,578 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. 21.7% moved within the county in the past year — the U.S. baseline is roughly 8–10%.
| Moved within the county (past year) | 21.7% |
|---|---|
| Migration · People moving in (annual) | 112,262 |
| Migration · People moving out (annual) | 112,232 |
| Migration · Net migration (in − out) | 30 |
| 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 | 393 |
|---|---|
| Disability rate | 9.8% |
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. 350 residents live in group quarters (7.3% of population).
| Living in group quarters | 350 |
|---|
Other
| Congressional District · District | 5 |
|---|---|
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 24,037 |
| Cdc Birth Rate · State Fips | 24 |
| Cdc Birth Rate · County Fips | 37 |
| Cdc Birth Rate · County | St Marys |
| Cdc Birth Rate · Birth Rate | 10.7% |
| Cdc Birth Rate · Lower Ci | 9.20 |
| Cdc Birth Rate · Upper Ci | 12.30 |
| Cdc Mortality · Fips | 24,037 |
| Cdc Mortality · County | St. Mary's County |
| Cdc Mortality · Urban Rural | Small metro |
| Cdc Mortality · Total Deaths 2020 2023 | 3,099 |
| Cdc Vaccination · Fips | 24,037 |
| Cdc Vaccination · County | St. Mary's County |
| Cdc Vaccination · Dose1 Pop Pct | 77.8% |
| Cdc Vaccination · Series Complete Pct | 68.9% |
| Cdc Vaccination · Booster Pct | 51.5% |
| Cdc Vaccination · Population 2019 | 113,510 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 6.10 |
| Family Score · Schools | 5 |
| Family Score · Childcare Centers | 7 |
| Family Score · Youth Sports Orgs | 1 |
| Family Score · Children Pct | 29.8% |
| Family Score · Rating | good |
| Town Summary · Key Facts | population 4,808, growing, family-oriented, affluent, white collar |
| Town Summary · Population | 4,808 people |
| Town Summary · County | St. Mary's County |
Sources: NCES school congressional district assignment · federal dataset cascade