Alton Population

1980–2026

25,255

2026 projection

37.6% since 2020 (increase)

05K10K15K20K25K30K19801990200020102020

Source: U.S. Census Bureau decennial counts and annual 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 Alton. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202625,255+1,1174.63%
202524,138+1,3105.74%
202422,828+1,6797.94%
202321,149+1,5067.67%
202219,643+7994.24%
202118,844+4872.65%
202018,357+1530.84%
201918,204+7234.14%
201817,481+3281.91%
201717,153+4002.39%

Showing 10 of 20 years.

Alton Demographics

26.1median age

Median age

Female26.8 yrs
Male24.5 yrs

Adults

13,035
1,433 seniors · 11%11,602 other adults

Sex

Female 48.8% · 9,870Male 51.2% · 10,344

Population by age

MaleFemale85+ years, male: 7985+ years, female: 2880–84 years, male: 4480–84 years, female: 3775–79 years, male: 9475–79 years, female: 13570–74 years, male: 14070–74 years, female: 30065–69 years, male: 30665–69 years, female: 27060–64 years, male: 20560–64 years, female: 21955–59 years, male: 46255–59 years, female: 31050–54 years, male: 37150–54 years, female: 30845–49 years, male: 63645–49 years, female: 58740–44 years, male: 45240–44 years, female: 84735–39 years, male: 75335–39 years, female: 58230–34 years, male: 81030–34 years, female: 74125–29 years, male: 65525–29 years, female: 91020–24 years, male: 1,27820–24 years, female: 73615–19 years, male: 1,11015–19 years, female: 1,03210–14 years, male: 1,08310–14 years, female: 1,0965–9 years, male: 1,0675–9 years, female: 6410–4 years, male: 7990–4 years, female: 1,09185+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 202 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

Alton Income

$52,715median household income

Median household income

$52,715

Half of households earn more, half earn less

Median earnings

$31,322

Typical yearly pay for a worker 25 or older.

Poverty rate

27.5%

About 1 in 4 residents

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

Alton Marital Status

43% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married43%43%43%
Never married41%45%37%
Divorced9%8%10%
Widowed3%2%4%
Separated4%2%6%

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

Sources

10 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year