Jefferson County Population

1820–2026

234.13K

2026 projection

3.2% since 2020 (increase)

050K100K150K200K250K1850190019502000

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 Jefferson County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026234,130+9980.43%
2025233,132+9980.43%
2024232,134+9270.40%
2023231,207+1,9370.84%
2022229,270+1,2080.53%
2021228,062+1,1180.49%
2020226,944+1,5420.68%
2019225,402+7460.33%
2018224,656+8130.36%
2017223,843+4040.18%

Showing 10 of 35 years.

Jefferson County Demographics

40.3median age

Median age

Female41.1 yrs
Male39.7 yrs

Adults

177,825
38,261 seniors (65+) · 22% of adults139,564 other adults

Sex

Female 50% · 114,708Male 50% · 114,750

Population by age

MaleFemale85+ years, male: 1,52285+ years, female: 2,00780–84 years, male: 1,57280–84 years, female: 2,43775–79 years, male: 2,85275–79 years, female: 3,37570–74 years, male: 5,18470–74 years, female: 5,69165–69 years, male: 6,57865–69 years, female: 7,04360–64 years, male: 9,15260–64 years, female: 8,62855–59 years, male: 7,48155–59 years, female: 8,02750–54 years, male: 7,48750–54 years, female: 7,65445–49 years, male: 7,31445–49 years, female: 6,83840–44 years, male: 7,69240–44 years, female: 7,19635–39 years, male: 8,24935–39 years, female: 8,33930–34 years, male: 7,54930–34 years, female: 7,60925–29 years, male: 6,89125–29 years, female: 6,44520–24 years, male: 6,31720–24 years, female: 6,21515–19 years, male: 7,30615–19 years, female: 6,78910–14 years, male: 7,98210–14 years, female: 7,0935–9 years, male: 7,1335–9 years, female: 7,1760–4 years, male: 6,4890–4 years, female: 6,14685+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–42K2K4K4K6K6K8K8K

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 2,295 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

Jefferson County Income

$82,851median household income

Median household income

$82,851

Half of households earn more, half earn less

Median earnings

$53,166

Typical yearly pay for a worker 25 or older.

Poverty rate

9%

About 1 in 11 residents

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

Jefferson County Marital Status

54% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married54%56%52%
Never married27%30%25%
Divorced12%11%12%
Widowed6%3%9%
Separated1%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