Data / Rankings / Median age / Counties in Wisconsin

Counties in Wisconsin by median age

Iron County had the highest median age of 72 counties in 2021, at 55.3 years. Menominee County had the lowest, at 31.3 years. The median was 43.1 years and the figure for Wisconsin was 39.6 years. Source: the U.S. Census Bureau.

Highest55.3Iron County
Lowest31.3Menominee County
Median43.172 counties
Wisconsin39.6History

Top 40 counties, 2021

CSVChart (SVG)

Iron CountyIron County: 55.3 years55.3Vilas CountyVilas County: 55 years55Adams CountyAdams County: 54.5 years54.5Florence CountyFlorence County: 54.4 years54.4Burnett CountyBurnett County: 53.4 years53.4Door CountyDoor County: 53.3 years53.3Bayfield CountyBayfield County: 52.8 years52.8Price CountyPrice County: 51.8 years51.8Washburn CountyWashburn County: 51.7 years51.7Oneida CountyOneida County: 51.4 years51.4Sawyer CountySawyer County: 50.8 years50.8Marquette CountyMarquette County: 50.1 years50.1Waushara CountyWaushara County: 49.5 years49.5Rusk CountyRusk County: 48.7 years48.7Marinette CountyMarinette County: 48.6 years48.6Langlade CountyLanglade County: 48.5 years48.5Lincoln CountyLincoln County: 48 years48Oconto CountyOconto County: 47.4 years47.4Forest CountyForest County: 47.3 years47.3Crawford CountyCrawford County: 46.8 years46.8Pepin CountyPepin County: 46.7 years46.7Buffalo CountyBuffalo County: 46.5 years46.5Polk CountyPolk County: 46.3 years46.3Richland CountyRichland County: 45.8 years45.8Juneau CountyJuneau County: 45.4 years45.4Shawano CountyShawano County: 45.3 years45.3Waupaca CountyWaupaca County: 45.3 years45.3Green Lake CountyGreen Lake County: 45.1 years45.1Manitowoc CountyManitowoc County: 44.8 years44.8Barron CountyBarron County: 44.3 years44.3Kewaunee CountyKewaunee County: 44 years44Taylor CountyTaylor County: 43.9 years43.9Ozaukee CountyOzaukee County: 43.5 years43.5Wood CountyWood County: 43.4 years43.4Washington CountyWashington County: 43.2 years43.2Iowa CountyIowa County: 43.1 years43.1Green CountyGreen County: 43 years43Waukesha CountyWaukesha County: 43 years43Columbia CountyColumbia County: 42.6 years42.6Dodge CountyDodge County: 42.6 years42.6
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2021
years
1Iron County55.3
2Vilas County55
3Adams County54.5
4Florence County54.4
5Burnett County53.4
6Door County53.3
7Bayfield County52.8
8Price County51.8
9Washburn County51.7
10Oneida County51.4
11Sawyer County50.8
12Marquette County50.1
13Waushara County49.5
14Rusk County48.7
15Marinette County48.6
16Langlade County48.5
17Lincoln County48
18Oconto County47.4
19Forest County47.3
20Crawford County46.8
21Pepin County46.7
22Buffalo County46.5
23Polk County46.3
24Richland County45.8
25Juneau County45.4
26Shawano County45.3
26Waupaca County45.3
28Green Lake County45.1
29Manitowoc County44.8
30Barron County44.3
31Kewaunee County44
32Taylor County43.9
33Ozaukee County43.5
34Wood County43.4
35Washington County43.2
36Iowa County43.1
37Green County43
37Waukesha County43
39Columbia County42.6
39Dodge County42.6
41Douglas County42.3
42Jefferson County41.8
43Ashland County41.7
44Fond du Lac County41.6
44Jackson County41.6
46Calumet County41.5
47Lafayette County41.4
47Vernon County41.4
49Chippewa County41.3
49Sheboygan County41.3
51Marathon County40.8
51Sauk County40.8
53Trempealeau County40.6
54Walworth County40.5
55Racine County40.1
56Monroe County39.8
56Rock County39.8
58St. Croix County39.6
59Kenosha County38.7
60Outagamie County38.3
61Winnebago County38.2
62Brown County37.6
62Portage County37.6
64Pierce County37.4
65Clark County37.2
66La Crosse County36.3
67Grant County36.2
68Dane County35.4
69Dunn County35.3
70Eau Claire County35.2
71Milwaukee County35.1
72Menominee County31.3

Other periods

About this ranking

Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b01002.dat. Retrieved 2026-10-08.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Wisconsin by median age using official data, and cite the source.
rank_places {"indicator":"median_age","level":"province","within":"Wisconsin","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=median_age&level=province&within=Wisconsin&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest median age?

Iron County, with 55.3 years in 2021, according to the U.S. Census Bureau.

Which county has the lowest median age?

Menominee County, with 31.3 years in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B01002: median age, total population. Retrieved 2026-10-08.

Median age: other rankings

Counties in Wisconsin: more rankings