Bryn Mawr: Demographics & People
Bryn Mawr is home to 5,880 people, in 1,865 households. Population grew 1.8% from 5,777 (2022) to 5,880 (2024). Median age 23.1 years. (18.1y younger than Montgomery County; 13.7y younger than Pennsylvania). Children under 18 are 10% of the population. Population is 72% White (non-Hispanic) and 8% Black. 43% of households are family-led. County is losing 6,493 residents per year (2022-2023). County health: 31% adult obesity, 13% smoke.
- 3.2 people per household (vs Pennsylvania avg 2.4).
- 57% non-family households (singles, roommates) (vs Pennsylvania 44%).
- 32 dependents per 100 working-age (youth + seniors / 18-64) (vs Pennsylvania 66).
Population & Trend
Population grew 1.8% from 5,777 (2022) to 5,880 (2024) — about 3.0× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~5,985 (extrapolated at 0.9%/yr trend). Census Bureau Vintage estimate: 6,126.
| Census data vintage | 2024 |
|---|---|
| Population | 576,830 people |
| Annual growth rate · Population change | 1.8% |
| Annual growth rate · Population (2022) | 5,777 |
| Annual growth rate · Population (2024) | 5,880 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | growing |
| Population | 5,880 people (vs Pennsylvania 12,317) |
| Population Estimate | 6,126 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 23.1y is 15.8 years younger than the U.S. median (38.9y). Children under 18 make up 10% — below the U.S. share of ~22%.
| Age Summary · Median age | 23.1 years (vs Pennsylvania 36.8y) |
|---|---|
| Age Summary · Children Pct | 10.2% |
| Age Summary · Character | young community |
| Age Summary · Total Pop | 5,880 |
| Age Summary · Under 18 | 601 |
| Age Summary · 18 To 34 | 2,973.0× |
| Age Summary · 35 To 64 | 1,488.0× |
| Age Summary · 65 Plus | 818 |
| Population under 18 | 601 |
| Median age | 23.1 years (vs Pennsylvania 36.8y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 5,880 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups).
| White residents | 4,358 |
|---|---|
| Black residents | 534 |
| Asian residents | 396 |
| Hispanic or Latino residents | 547 |
| Diversity Index · Simpson Index | 42.9% |
| Diversity Index · Interpretation | moderately diverse |
| Asian population | 6.0% (vs Pennsylvania 2.5%) |
| Black population | 8.5% (vs Pennsylvania 7.7%) |
| Hispanic or Latino population | 8.0% (vs Pennsylvania 8.1%) |
| White (non-Hispanic) population | 72.4% (vs Pennsylvania 71.2%) |
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 (8)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS). 1.9% are foreign-born — below the U.S. average of 13.9%. 9% have naturalized to U.S. citizenship.
| Residents born in this state | 2,759 |
|---|---|
| Residents born in another state | 2,473 |
| Share born in this state | 46.9% |
| Share born in another state | 53.1% |
| Native-born U.S. citizens | 42.1% |
| Foreign-born residents | 1.9% |
| Naturalized citizens | 9.1% |
| Total foreign-born residents | 746 |
| From Europe | 117 |
| From Africa | 281 |
| From Latin America | 8 |
Households & Family Composition
1,865 households. Averaging 2.1 people each — smaller than the U.S. average of 2.5. 43% are family households — below the U.S. share of ~65%. Of 890 families, 28% are married couples with children.
| Children under 18 | 513 |
|---|---|
| Total families | 890 |
| Married couples with children | 245 |
| Single-parent households | 9 |
| Average household size | 2.12 |
| Women who gave birth (past year) | 8.2% |
| Grandparents living with grandchildren | 9,689 |
| Grandparents responsible for grandchildren | 3,831 |
| Family households | 796 households (vs Pennsylvania 2,885) |
| Households that are families | 42.7% (vs Pennsylvania 55.6%) |
| Total households | 1,865 households (vs Pennsylvania 5,038) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 26.9% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 6,493 residents per year on net (IRS migration data).
| Moved within the county (past year) | 26.9% |
|---|---|
| Migration · People moving in (annual) | 514,150 |
| Migration · People moving out (annual) | 520,643 |
| Migration · Net migration (in − out) | -6,493 |
| 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 | 224 |
|---|---|
| Disability rate | 4.2% |
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. 1,885 residents live in group quarters (32.1% of population).
| Living in group quarters | 1,885 |
|---|
Other
| Congressional District · District | 5 |
|---|---|
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 42045 |
| Cdc Birth Rate · State Fips | 42 |
| Cdc Birth Rate · County Fips | 045 |
| Cdc Birth Rate · County | Delaware |
| Cdc Birth Rate · Birth Rate | 9.8% |
| Cdc Birth Rate · Lower Ci | 9.10 |
| Cdc Birth Rate · Upper Ci | 10.50 |
| Cdc Mortality · Fips | 42045 |
| Cdc Mortality · County | Delaware County |
| Cdc Mortality · Urban Rural | Large fringe metro |
| Cdc Mortality · Total Deaths 2020 2023 | 18,487 |
| Cdc Vaccination · Fips | 42045 |
| Cdc Vaccination · County | Delaware County |
| Cdc Vaccination · Dose1 Pop Pct | 95.0% |
| Cdc Vaccination · Series Complete Pct | 83.4% |
| Cdc Vaccination · Booster Pct | 44.1% |
| Cdc Vaccination · Population 2019 | 566,747 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 3.90 |
| Family Score · Schools | 2 |
| Family Score · Childcare Centers | 3 |
| Family Score · Youth Sports Orgs | 2 |
| Family Score · Children Pct | 10.2% |
| Family Score · Rating | fair |
| Town Summary · Key Facts | population 5,880, growing, young community, upper-middle, white collar |
| Town Summary · Population | 5,880 people (vs Pennsylvania 12,317) |
| Town Summary · County | Delaware County |
Sources: NCES school congressional district assignment · federal dataset cascade