• county
  • FIPS 55133
  • Largest town: Waukesha

Waukesha County, Wisconsin

Waukesha County had 417,029 residents in the Census Vintage 2024 estimate, on 549.7 square miles of land. It ranks 3rd of 72 in Wisconsin by population and 55th by land area.

Population
417,029
#3 of 72 in Wisconsin · #182 in US
Area
549.7 sq mi
#55 of 72 in Wisconsin · #1,899 in US
Density
759 / sq mi
#2 of 72 in Wisconsin · #200 in US
Median household income
$99,168
#2 of 72 in Wisconsin · #144 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Waukesha County within Wisconsin. Pin: Madison.

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Waukesha County population, land area and income

Waukesha County had 417,029 residents in the Census Vintage 2024 estimate, on 549.7 square miles of land. It ranks 3rd of 72 in Wisconsin by population and 55th by land area. That works out to 758.6 people per square mile, 7.9 times the US average of 96.3, and in the top tenth nationally.

The median county-equivalent in Wisconsin has 41,821 residents, so Waukesha County is 10.0 times that size.

Its SAIPE 2023 median household income of $99,168 is in the top tenth among 3,143 counties with an estimate.

National rank among 3,144

Population

417,029

3144th1st

182nd of 3,144 (US)

Land area

550 sq mi

3144th1st

1899th of 3,144 (US)

Density

758.6 / sq mi

3144th1st

200th of 3,144 (US)

Median household income

$99,168

3143rd1st

144th of 3,143 (US)

Rank within Wisconsin (72)

Population

417,029

72nd1st

3rd of 72 (WI)

Land area

550 sq mi

72nd1st

55th of 72 (WI)

Density

758.6 / sq mi

72nd1st

2nd of 72 (WI)

Median household income

$99,168

72nd1st

2nd of 72 (WI)

How Waukesha County's population changed since 2020

Waukesha County gained 9,511 residents between the July 2020 and July 2024 estimates, a rise of 2.3%. That ranks 16th of 72 in Wisconsin for growth. The median Wisconsin county changed by +1.0%, and the state as a whole by +1.1%.

Since the April 2020 estimates base, Waukesha County recorded 15,926 births and 16,993 deaths, a natural change of -1,067. Net international migration added +3,947 and net domestic migration, people moving to or from other US counties, came to +7,171. The largest single component was domestic migration, which added 7,171 people.

407.5k2020409.2k2021411.1k2022414.0k2023417.0k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
15,926
Deaths
16,993
Net international migration
+3,947
Net domestic migration
+7,171
Change, July 2023 to July 2024
+3,016

Where Waukesha County is

The Census internal point of Waukesha County is at 43.018400, -88.304200. It sits in UTM zone 16N. The map shades Wisconsin's 72 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Waukesha County outlined. Dots are towns of 1,000+ people with residents in it.

Barron County: +0.2%Green County: +0.4%Dunn County: +1.5%Jefferson County: +0.0%Lincoln County: +0.1%Rusk County: -0.1%Fond du Lac County: +0.1%Marquette County: +1.0%Outagamie County: +2.3%Waupaca County: -1.2%Oneida County: +0.8%Eau Claire County: +2.8%Washington County: +1.4%Portage County: +2.3%Menominee County: +0.7%Clark County: +0.5%Monroe County: +0.2%Milwaukee County: -1.5%Buffalo County: +1.1%Lafayette County: +4.2%Ozaukee County: +2.5%Rock County: +1.0%Sheboygan County: +0.2%Green Lake County: +1.8%Waukesha County: +2.3%Calumet County: +2.1%Dodge County: -0.8%Wood County: -0.3%Winnebago County: +0.9%Sawyer County: +4.0%Dane County: +4.6%Sauk County: +1.1%Pepin County: +2.9%Adams County: +3.2%Price County: +0.4%Taylor County: +1.1%Grant County: +0.7%Trempealeau County: -0.0%Vernon County: +2.1%Waushara County: +2.2%Iowa County: +1.0%Crawford County: -0.5%Kenosha County: -0.3%Shawano County: +1.1%Juneau County: -0.7%Jackson County: -0.3%Vilas County: +3.7%Bayfield County: +3.7%Chippewa County: +1.5%Iron County: +1.5%Racine County: +0.3%Door County: +1.3%Ashland County: +1.1%Kewaunee County: +0.9%Polk County: +1.8%Florence County: +2.4%Douglas County: -0.2%Forest County: +3.7%Columbia County: -0.7%Walworth County: +0.7%La Crosse County: +0.1%Manitowoc County: +0.1%Oconto County: +2.5%Langlade County: +0.4%Marathon County: +0.7%Washburn County: +2.2%Brown County: +1.8%Richland County: -0.9%Marinette County: +1.1%St. Croix County: +4.3%Pierce County: +2.7%Burnett County: +3.7%
Change 2020 to 2024
  1. < +0.1%
  2. < +0.7%
  3. < +1.3%
  4. < +2.3%
  5. ≥ +2.3%
no data

Orange pin: Waukesha County internal point. Dark pin: Madison.

Internal point

Decimal
43.018400, -88.304200
DMS
43°01'6.24"N 88°18'15.12"W
UTM
16N 393727.9E 4763683.3N
Geohash
dp9hwx6b7
Plus code
86MH2M9W+98

Towns in Waukesha County

26 incorporated places of 1,000+ people have residents in Waukesha County, 361,601 people together, or 87% of the county. Each figure counts only the part of the town inside Waukesha County; towns marked "part" extend into another county. The largest is Waukesha with 71,461.

  1. 01Waukesha71,461
  2. 02Brookfield41,268
  3. 03Menomonee Falls40,700
  4. 04New Berlin40,302
  5. 05Muskego25,759
  6. 06Oconomowoc20,002
  7. 07Pewaukee16,437
  8. 08Sussex12,607
  9. 09Lisbon11,127
  10. 10Hartland10,203
  11. 11Waukesha8,573
  12. 12Mukwonago (part)8,294
  13. 13Pewaukee8,230
  14. 14Vernon7,505
  15. 15Delafield7,275
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Waukesha County

The Census 2024 county adjacency file lists 7 neighbors for Waukesha County. The most populous is Milwaukee County, WI, with 924,740 residents. Distances run between Census internal points in a straight line.

Distance to Madison and the nearest big city

Madison is 54.7 miles W of Waukesha County's internal point in a straight line. The nearest place of 100,000 or more is Milwaukee, WI (population 563,531), 17.3 miles away. The nearest place of 10,000 or more is Waukesha, WI (population 71,461), 3.0 miles away.

Waukesha County FIPS code

The FIPS code of Waukesha County is 55133: state code 55 for Wisconsin plus county code 133. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $99,168.

Questions people ask

What is the population of Waukesha County, Wisconsin?

The Census Vintage 2024 estimate for July 1, 2024 is 417,029. That is up 9,511 people (2.3%) from the July 2020 estimate of 407,518.

What is the FIPS code of Waukesha County?

55133. The first two digits (55) are Wisconsin; the last three (133) identify the county.

What is the largest town in Waukesha County?

Waukesha, with 71,461 residents inside Waukesha County in 2024.

Which counties border Waukesha County?

7 county-equivalents border it in the Census 2024 adjacency file: Milwaukee County, WI; Racine County, WI; Washington County, WI; Walworth County, WI; Ozaukee County, WI; Dodge County, WI; Jefferson County, WI.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.