Millbrook: Demographics & People
Census counts 17,189 people in Millbrook, in 6,772 households. Population grew 1.6% from 16,923 (2022) to 17,189 (2024). Median age 38.5 years. (1.0y younger than Elmore County; 0.8y younger than Alabama). Children under 18 are 22% of the population. Population is 64% White (non-Hispanic) and 26% Black. 66% of households are family-led. County is gaining 1,777 residents per year (2022-2023). County health: 38% adult obesity, 15% smoke.
- 2.5 people per household (vs Alabama avg 2.5).
- 34% non-family households (singles, roommates) (vs Alabama 39%).
- 61 dependents per 100 working-age (youth + seniors / 18-64) (vs Alabama 67).
Population & Trend
Population grew 1.6% from 16,923 (2022) to 17,189 (2024) — about 2.6× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~17,459 (extrapolated at 0.8%/yr trend). Census Bureau Vintage estimate: 17,824.
| Census data vintage | 2024 |
|---|---|
| County Population | 58,805 people |
| Annual growth rate · Population change | 1.6% |
| Annual growth rate · Population (2022) | 16,923 |
| Annual growth rate · Population (2024) | 17,189 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | growing |
| Population | 17,189 people (vs Alabama 26,673) |
| Population Estimate | 17,824 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 38.5y is 0.4 years younger than the U.S. median (38.9y). Children under 18 make up 22% — near the U.S. share of ~22%.
| Age Summary · Median age | 38.5 years (vs Alabama 37.3y) |
|---|---|
| Age Summary · Children Pct | 22.0% |
| Age Summary · Character | family-oriented |
| Age Summary · Total Pop | 17,189 |
| Age Summary · Under 18 | 3,788 |
| Age Summary · 18 To 34 | 4,082 |
| Age Summary · 35 To 64 | 6,604 |
| Age Summary · 65 Plus | 2,715 |
| Population under 18 | 3,788 |
| Median age | 38.5 years (vs Alabama 37.3y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 17,189 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups).
| White residents | 11,183 |
|---|---|
| Black residents | 4,450 |
| Asian residents | 245 |
| Hispanic or Latino residents | 596 |
| Diversity Index · Simpson Index | 50.7% |
| Diversity Index · Interpretation | moderately diverse |
| Asian population | 1.4% (at Alabama median) |
| Black population | 26.4% (vs Alabama 28.6%) |
| Hispanic or Latino population | 3.1% (vs Alabama 4.8%) |
| White (non-Hispanic) population | 64.4% (vs Alabama 57.1%) |
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)
Sources: Census ACS 2022 B04006+B03001+B02001
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS). 1.8% are foreign-born — below the U.S. average of 13.9%. 3% have naturalized to U.S. citizenship.
| Residents born in this state | 10,900 |
|---|---|
| Residents born in another state | 5,505 |
| Share born in this state | 63.4% |
| Share born in another state | 36.6% |
| Native-born U.S. citizens | 32.0% |
| Foreign-born residents | 1.8% |
| Naturalized citizens | 2.8% |
| Total foreign-born residents | 347 |
| From Europe | 17 |
| From Africa | 77 |
Households & Family Composition
6,772 households. Averaging 2.6 people each — larger than the U.S. average of 2.5. 66% are family households — near the U.S. share of ~65%. Of 4,413 families, 22% are married couples with children.
| Children under 18 | 3,926 |
|---|---|
| Total families | 4,413 |
| Married couples with children | 984 |
| Single-parent households | 28 |
| Average household size | 2.60 |
| Women who gave birth (past year) | 13.6% |
| Grandparents living with grandchildren | 593 |
| Grandparents responsible for grandchildren | 201 |
| Family households | 4,494 households (vs Alabama 7,066) |
| Households that are families | 66.4% (vs Alabama 61.2%) |
| Total households | 6,772 households (vs Alabama 10,925) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 8.6% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 1,777 residents per year on net (IRS migration data).
| Moved within the county (past year) | 8.6% |
|---|---|
| Migration · People moving in (annual) | 57,936 |
| Migration · People moving out (annual) | 56,159 |
| Migration · Net migration (in − out) | 1,777 |
| Migration · Population growing | Yes |
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 | 1,110 |
|---|---|
| Disability rate | 6.8% |
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. 47 residents live in group quarters (0.3% of population).
| Living in group quarters | 47 |
|---|
Other
| Congressional District · District | 102 |
|---|---|
| Congressional District · Congress | 118th |
| County Cdc Birth Rate · Fips | 01001 |
| County Cdc Birth Rate · State Fips | 01 |
| County Cdc Birth Rate · County Fips | 001 |
| County Cdc Birth Rate · County | Autauga |
| County Cdc Birth Rate · Birth Rate | 21.4 per 1,000 |
| County Cdc Birth Rate · Lower Ci | 18.30 |
| County Cdc Birth Rate · Upper Ci | 24.80 |
| County Cdc Mortality · Fips | 01001 |
| County Cdc Mortality · County | Autauga County |
| County Cdc Mortality · Urban Rural | Medium metro |
| County Cdc Mortality · Total Deaths 2020 2023 | 1,811 |
| County Cdc Vaccination · Fips | 01001 |
| County Cdc Vaccination · County | Autauga County |
| County Cdc Vaccination · Dose1 Pop Pct | 58.0% |
| County Cdc Vaccination · Series Complete Pct | 46.1% |
| County Cdc Vaccination · Booster Pct | 38.0% |
| County Cdc Vaccination · Population 2019 | 55,869 |
| County Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 4.30 |
| Family Score · Schools | 3 |
| Family Score · Childcare Centers | 6 |
| Family Score · Children Pct | 22.0% |
| Family Score · Rating | fair |
| Town Summary · Key Facts | population 17,189, growing, family-oriented, middle-class, mixed |
| Town Summary · Population | 17,189 people (vs Alabama 26,673) |
| Town Summary · County | Autauga County |
Sources: NCES school congressional district assignment · federal dataset cascade