Jefferson County Population

1810–2026

110.29K

2026 projection

5% since 2020 (decrease)

020K40K60K80K100K120K140K1850190019502000

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.
2026110,285-1,2551.13%
2025111,540-1,2551.11%
2024112,795-4850.43%
2023113,280-2,2131.92%
2022115,493-1,5261.30%
2021117,019+9440.81%
2020116,075+5,9325.39%
2019110,143-2,1231.89%
2018112,266-1,2221.08%
2017113,488+2080.18%

Showing 10 of 36 years.

Jefferson County Demographics

33.7median age

Median age

Female35.9 yrs
Male31.9 yrs

Adults

87,387
17,381 seniors (65+) · 20% of adults70,006 other adults

Sex

Female 47.5% · 54,679Male 52.5% · 60,361

Population by age

MaleFemale85+ years, male: 62485+ years, female: 1,28880–84 years, male: 85980–84 years, female: 1,24875–79 years, male: 1,57475–79 years, female: 1,46170–74 years, male: 1,95670–74 years, female: 2,73865–69 years, male: 2,96665–69 years, female: 2,66760–64 years, male: 3,11860–64 years, female: 3,36155–59 years, male: 3,18555–59 years, female: 3,03350–54 years, male: 3,02650–54 years, female: 2,83145–49 years, male: 2,65645–49 years, female: 2,57840–44 years, male: 3,43040–44 years, female: 3,10635–39 years, male: 3,96535–39 years, female: 3,73630–34 years, male: 4,68930–34 years, female: 3,82025–29 years, male: 5,76025–29 years, female: 4,40820–24 years, male: 6,78620–24 years, female: 3,81415–19 years, male: 3,71415–19 years, female: 3,15310–14 years, male: 3,62910–14 years, female: 3,6115–9 years, male: 4,1555–9 years, female: 3,7380–4 years, male: 4,2690–4 years, female: 4,08885+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–42K2K4K4K6K6K

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 1,150 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

$66,301median household income

Median household income

$66,301

Half of households earn more, half earn less

Median earnings

$46,558

Typical yearly pay for a worker 25 or older.

Poverty rate

13.7%

About 1 in 7 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%53%55%
Never married30%35%23%
Divorced10%8%12%
Widowed5%2%8%
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