Lake County Population

1840–2026

720.19K

2026 projection

1% since 2020 (increase)

0200K400K600K800K1840186018801900192019401960198020002020

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.
2026720,188+8490.12%
2025719,339+8490.12%
2024718,490+4,8370.68%
2023713,653+1,2410.17%
2022712,412-1,3630.19%
2021713,775+3980.06%
2020713,377+16,2432.33%
2019697,134-3,3210.47%
2018700,455-2,3700.34%
2017702,825-1,5760.22%

Showing 10 of 33 years.

Lake County Demographics

39.1median age

Median age

Female40.3 yrs
Male37.9 yrs

Adults

547,917
112,792 seniors (65+) · 21% of adults435,125 other adults

Sex

Female 49.7% · 354,995Male 50.3% · 359,228

Population by age

MaleFemale85+ years, male: 4,94685+ years, female: 7,69080–84 years, male: 5,35580–84 years, female: 7,10575–79 years, male: 8,76375–79 years, female: 11,03570–74 years, male: 13,89970–74 years, female: 15,91065–69 years, male: 18,79065–69 years, female: 19,29960–64 years, male: 22,58960–64 years, female: 23,78455–59 years, male: 24,66155–59 years, female: 24,06350–54 years, male: 24,19250–54 years, female: 24,00145–49 years, male: 23,01345–49 years, female: 22,88540–44 years, male: 23,69840–44 years, female: 22,99035–39 years, male: 22,74435–39 years, female: 22,68330–34 years, male: 20,27030–34 years, female: 19,83325–29 years, male: 21,51325–29 years, female: 19,59820–24 years, male: 27,33120–24 years, female: 22,98515–19 years, male: 29,36915–19 years, female: 25,82010–14 years, male: 24,87010–14 years, female: 24,1785–9 years, male: 23,8565–9 years, female: 22,5380–4 years, male: 19,3690–4 years, female: 18,59885+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–410K10K20K20K

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 7,142 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

$110,416median household income

Median household income

$110,416

Half of households earn more, half earn less

Median earnings

$64,173

Typical yearly pay for a worker 25 or older.

Poverty rate

8.3%

About 1 in 12 residents

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

Lake 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%55%53%
Never married32%35%29%
Divorced9%7%10%
Widowed5%2%7%
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