Hamilton County Population

1820–2026

394.4K

2026 projection

7.2% since 2020 (increase)

0100K200K300K400K1850190019502000

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 Hamilton County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026394,398+3,5650.91%
2025390,833+3,5650.92%
2024387,268+6,1811.62%
2023381,087+5,3491.42%
2022375,738+6,0131.63%
2021369,725+1,8390.50%
2020367,886+1100.03%
2019367,776+3,1500.86%
2018364,626+3,2640.90%
2017361,362+3,1970.89%

Showing 10 of 35 years.

Hamilton County Demographics

39.5median age

Median age

Female40.8 yrs
Male38.1 yrs

Adults

296,881
69,086 seniors (65+) · 23% of adults227,795 other adults

Sex

Female 51.5% · 193,712Male 48.5% · 182,480

Population by age

MaleFemale85+ years, male: 2,67685+ years, female: 4,78580–84 years, male: 3,48580–84 years, female: 4,92575–79 years, male: 5,62275–79 years, female: 7,32870–74 years, male: 8,54970–74 years, female: 9,92365–69 years, male: 10,01965–69 years, female: 11,77460–64 years, male: 11,62160–64 years, female: 12,60355–59 years, male: 11,28255–59 years, female: 12,18350–54 years, male: 11,44350–54 years, female: 11,94445–49 years, male: 10,82945–49 years, female: 11,21840–44 years, male: 11,03140–44 years, female: 12,25235–39 years, male: 13,24935–39 years, female: 12,38330–34 years, male: 13,61630–34 years, female: 14,25825–29 years, male: 12,83625–29 years, female: 13,27120–24 years, male: 11,11820–24 years, female: 11,33815–19 years, male: 11,39315–19 years, female: 11,46510–14 years, male: 11,42310–14 years, female: 10,9405–9 years, male: 11,1745–9 years, female: 10,3290–4 years, male: 11,1140–4 years, female: 10,79385+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45K5K10K10K

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 3,762 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

Hamilton County Income

$76,183median household income

Median household income

$76,183

Half of households earn more, half earn less

Median earnings

$50,555

Typical yearly pay for a worker 25 or older.

Poverty rate

13.1%

About 1 in 8 residents

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

Hamilton County Marital Status

49% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married49%51%46%
Never married32%34%29%
Divorced12%10%14%
Widowed6%3%10%
Separated2%1%2%

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

Sources

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

Population

American Community Survey, 2024 5-year