Ballwin Population

1850–2026

30,733

2026 projection

1.2% since 2020 (decrease)

05K10K15K20K25K30K35K186018801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Ballwin. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202630,733-1680.54%
202530,901-910.29%
202430,992-130.04%
202331,005-1610.52%
202231,166-2860.91%
202131,452+3491.12%
202031,103+720.23%
201931,031+650.21%
201830,966+320.10%
201730,934-80.03%

Showing 10 of 25 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

Growth since 2020, compared

Ballwin has a population change lower than St. Louis County, Missouri, and the U.S.

  • United States+3.1%
  • Missouri+1.9%
  • St. Louis County−1.2%
  • Ballwin−2.4%

Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.

Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.

Ballwin Demographics

42.6median age

Median age

Female45.1 yrs
Male40.4 yrs

Adults

24,318
5,960 seniors (65+) · 25% of adults18,358 other adults

Sex

Female 49.8% · 15,592Male 50.2% · 15,687

Population by age

MaleFemale85+ years, male: 20385+ years, female: 45380–84 years, male: 28180–84 years, female: 33975–79 years, male: 33775–79 years, female: 58270–74 years, male: 88770–74 years, female: 91165–69 years, male: 94565–69 years, female: 1,02260–64 years, male: 1,28960–64 years, female: 1,28655–59 years, male: 75755–59 years, female: 1,22450–54 years, male: 1,32250–54 years, female: 97945–49 years, male: 92145–49 years, female: 1,02440–44 years, male: 96040–44 years, female: 79035–39 years, male: 1,08735–39 years, female: 90730–34 years, male: 88730–34 years, female: 1,27525–29 years, male: 77725–29 years, female: 58420–24 years, male: 1,00720–24 years, female: 68015–19 years, male: 90815–19 years, female: 1,06710–14 years, male: 1,07710–14 years, female: 6445–9 years, male: 8155–9 years, female: 8400–4 years, male: 1,2270–4 years, female: 98585+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 313 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Ballwin Income

$124,626median household income

Median household income

$124,626

Half of households earn more, half earn less

Median earnings

$71,919

Typical yearly pay for a worker 25 or older.

Poverty rate

4.8%

About 1 in 21 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Ballwin Marital Status

62% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married62%64%59%
Never married25%28%22%
Divorced8%5%11%
Widowed5%3%7%
Separated<1%<1%<1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

14 sources

Population

American Community Survey, 2024 5-year

Additional sources