Waukesha County Population

1850–2026

418.65K

2026 projection

2.7% since 2020 (increase)

0100K200K300K400K500K186018801900192019401960198020002020

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 Waukesha County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026418,654+1,4440.35%
2025417,210+1,4440.35%
2024415,766+2,1850.53%
2023413,581+2,7350.67%
2022410,846+1,6470.40%
2021409,199+1,6930.42%
2020407,506+2,9610.73%
2019404,545+1,8400.46%
2018402,705+1,6060.40%
2017401,099+2,4350.61%

Showing 10 of 32 years.

Waukesha County Demographics

43.5median age

Median age

Female44.6 yrs
Male42.5 yrs

Adults

325,464
84,338 seniors (65+) · 26% of adults241,126 other adults

Sex

Female 50.4% · 207,556Male 49.6% · 204,206

Population by age

MaleFemale85+ years, male: 3,81585+ years, female: 6,95680–84 years, male: 4,48680–84 years, female: 5,44875–79 years, male: 6,31875–79 years, female: 7,62570–74 years, male: 11,09370–74 years, female: 11,91765–69 years, male: 12,87765–69 years, female: 13,80360–64 years, male: 15,29760–64 years, female: 16,23455–59 years, male: 14,99755–59 years, female: 14,91050–54 years, male: 13,41850–54 years, female: 13,41245–49 years, male: 12,80345–49 years, female: 12,47640–44 years, male: 13,94640–44 years, female: 13,52235–39 years, male: 13,42035–39 years, female: 13,08230–34 years, male: 11,29630–34 years, female: 11,09625–29 years, male: 10,60125–29 years, female: 10,21220–24 years, male: 11,05520–24 years, female: 10,62215–19 years, male: 13,19015–19 years, female: 12,27810–14 years, male: 12,76710–14 years, female: 12,3175–9 years, male: 12,2985–9 years, female: 11,6110–4 years, male: 10,5290–4 years, female: 10,03585+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 4,118 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

Waukesha County Income

$106,076median household income

Median household income

$106,076

Half of households earn more, half earn less

Median earnings

$67,176

Typical yearly pay for a worker 25 or older.

Poverty rate

5.2%

About 1 in 19 residents

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

Waukesha County Marital Status

58% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married58%60%56%
Never married26%29%24%
Divorced10%8%11%
Widowed6%3%9%
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