Jefferson County Population

1820–2026

36,182

2026 projection

2.2% since 2020 (decrease)

010K20K30K40K1850190019502000

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.
202636,182+350.10%
202536,147+350.10%
202436,112-1940.53%
202336,306-1520.42%
202236,458-4461.21%
202136,904-940.25%
202036,998-6371.69%
201937,635-690.18%
201837,704-3550.93%
201738,059-1770.46%

Showing 10 of 35 years.

Jefferson County Demographics

41.2median age

Median age

Female43.5 yrs
Male39.2 yrs

Adults

28,410
7,298 seniors (65+) · 26% of adults21,112 other adults

Sex

Female 48.4% · 17,679Male 51.6% · 18,871

Population by age

MaleFemale85+ years, male: 22585+ years, female: 51480–84 years, male: 40980–84 years, female: 44875–79 years, male: 64975–79 years, female: 75570–74 years, male: 93770–74 years, female: 96865–69 years, male: 1,11665–69 years, female: 1,27760–64 years, male: 1,25560–64 years, female: 1,12655–59 years, male: 1,28055–59 years, female: 1,26050–54 years, male: 1,12350–54 years, female: 1,11245–49 years, male: 1,22745–49 years, female: 1,01640–44 years, male: 99340–44 years, female: 1,09335–39 years, male: 1,44235–39 years, female: 1,04130–34 years, male: 1,24030–34 years, female: 1,04425–29 years, male: 1,26225–29 years, female: 96320–24 years, male: 1,09320–24 years, female: 77415–19 years, male: 1,16315–19 years, female: 1,04110–14 years, male: 1,26110–14 years, female: 1,1465–9 years, male: 1,1105–9 years, female: 1,1200–4 years, male: 1,0860–4 years, female: 98185+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 366 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

$63,118median household income

Median household income

$63,118

Half of households earn more, half earn less

Median earnings

$43,701

Typical yearly pay for a worker 25 or older.

Poverty rate

13.5%

About 1 in 7 residents

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

Jefferson County Marital Status

50% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married50%51%50%
Never married29%33%23%
Divorced13%12%14%
Widowed7%3%12%
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