Jefferson County Population

1840–2026

86,470

2026 projection

0.3% since 2020 (increase)

020K40K60K80K100K1840186018801900192019401960198020002020

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.
202686,470-350.04%
202586,505-350.04%
202486,540+4540.53%
202386,086+2030.24%
202285,883+530.06%
202185,830-3890.45%
202086,219+1,3901.64%
201984,829-2620.31%
201885,091+3580.42%
201784,733+2390.28%

Showing 10 of 33 years.

Jefferson County Demographics

41.5median age

Median age

Female42.1 yrs
Male41.1 yrs

Adults

69,032
15,933 seniors (65+) · 23% of adults53,099 other adults

Sex

Female 50% · 43,005Male 50% · 42,998

Population by age

MaleFemale85+ years, male: 42585+ years, female: 82580–84 years, male: 93380–84 years, female: 1,04075–79 years, male: 1,37175–79 years, female: 1,64370–74 years, male: 2,27770–74 years, female: 2,37165–69 years, male: 2,50965–69 years, female: 2,53960–64 years, male: 3,18660–64 years, female: 3,27155–59 years, male: 3,15755–59 years, female: 2,96150–54 years, male: 2,88750–54 years, female: 2,81245–49 years, male: 2,72145–49 years, female: 2,61540–44 years, male: 2,67140–44 years, female: 2,58635–39 years, male: 2,76935–39 years, female: 2,84330–34 years, male: 2,47630–34 years, female: 2,37025–29 years, male: 2,30225–29 years, female: 2,58320–24 years, male: 2,85520–24 years, female: 2,51415–19 years, male: 3,46515–19 years, female: 3,47710–14 years, male: 2,49810–14 years, female: 2,2905–9 years, male: 2,4355–9 years, female: 2,2600–4 years, male: 2,0610–4 years, female: 2,00585+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–41K1K2K2K3K3K

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 860 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

$83,750median household income

Median household income

$83,750

Half of households earn more, half earn less

Median earnings

$52,022

Typical yearly pay for a worker 25 or older.

Poverty rate

8.1%

About 1 in 12 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%52%49%
Never married32%35%29%
Divorced12%10%13%
Widowed6%3%8%
Separated<1%<1%<1%

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