Lake County Population

1840–2026

506.73K

2026 projection

1.6% since 2020 (increase)

0100K200K300K400K500K600K1840186018801900192019401960198020002020

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 Lake County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026506,727+2,1150.42%
2025504,612+2,1150.42%
2024502,497+2,3630.47%
2023500,134+5040.10%
2022499,630+6150.12%
2021499,015+720.01%
2020498,943+12,6992.61%
2019486,244+1,3260.27%
2018484,918+840.02%
2017484,834-1,5470.32%

Showing 10 of 33 years.

Lake County Demographics

39.7median age

Median age

Female40.9 yrs
Male38.4 yrs

Adults

384,539
89,442 seniors (65+) · 23% of adults295,097 other adults

Sex

Female 51.3% · 256,872Male 48.7% · 243,507

Population by age

MaleFemale85+ years, male: 3,29785+ years, female: 6,54880–84 years, male: 4,22880–84 years, female: 6,08075–79 years, male: 6,74475–79 years, female: 8,54870–74 years, male: 10,83470–74 years, female: 12,66165–69 years, male: 14,49265–69 years, female: 16,01060–64 years, male: 15,35460–64 years, female: 17,98155–59 years, male: 16,25855–59 years, female: 15,93650–54 years, male: 15,03850–54 years, female: 15,92045–49 years, male: 14,96345–49 years, female: 15,79740–44 years, male: 15,40340–44 years, female: 15,99835–39 years, male: 16,16235–39 years, female: 17,25030–34 years, male: 15,17430–34 years, female: 16,05725–29 years, male: 15,00525–29 years, female: 15,10620–24 years, male: 15,16020–24 years, female: 14,61915–19 years, male: 17,21615–19 years, female: 16,26910–14 years, male: 17,26810–14 years, female: 16,0855–9 years, male: 16,3445–9 years, female: 15,9450–4 years, male: 14,5670–4 years, female: 14,06285+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45K5K10K10K15K15K

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 5,004 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

Lake County Income

$71,493median household income

Median household income

$71,493

Half of households earn more, half earn less

Median earnings

$50,262

Typical yearly pay for a worker 25 or older.

Poverty rate

14.3%

About 1 in 7 residents

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

Lake County Marital Status

45% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married45%47%43%
Never married36%38%33%
Divorced11%10%12%
Widowed7%4%10%
Separated2%2%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