Counties in Wisconsin by median age on 1 July (US county estimates)

Iron County had the highest median age on 1 July (US county estimates) of 72 counties in 2017, at 55.7 years. Menominee County had the lowest, at 33 years. The median was 43.3 years. Source: the U.S. Census Bureau.

Highest55.7Iron County

Lowest33Menominee County

Median43.372 counties

Map of counties, 2017

Under 38
38 to 41
41 to 43
43 to 46
46 to 49
49 and over

years, 2017. Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2017

years. Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2017 years	Change on 2016
1	Iron County	55.7	+0.7
2	Vilas County	55.3	+0.3
3	Florence County	53.6	+0.3
4	Door County	53.5	+0.4
5	Adams County	53.2	+0.7
6	Bayfield County	53	+0.3
6	Burnett County	53	+0.4
8	Price County	52	+0.2
9	Oneida County	51.8	+0.6
10	Washburn County	51.6	+0.4
11	Sawyer County	51.3	+0.6
12	Marquette County	49.9	+0.2
13	Rusk County	49.1	+0.1
14	Marinette County	48.9	+0.3
15	Waushara County	48.8	+0.2
16	Langlade County	48.7	+0.1
17	Forest County	48	+0.4
18	Lincoln County	47.8	+0.4
19	Oconto County	46.8	+0.2
20	Pepin County	46.4	+0.3
21	Crawford County	46.3	+0.2
22	Green Lake County	46.2	-0.2
23	Buffalo County	46	-0.1
23	Waupaca County	46	+0.4
25	Polk County	45.7	+0.4
26	Juneau County	45.5	-0.2
27	Shawano County	45.4	+0.2
28	Richland County	45	0
29	Manitowoc County	44.8	+0.1
30	Barron County	44.7	+0.2
31	Wood County	44.4	+0.1
32	Ozaukee County	44.3	+0.2
33	Kewaunee County	43.8	-0.2
34	Iowa County	43.4	+0.1
34	Waukesha County	43.4	0
36	Green County	43.3	+0.3
37	Washington County	43.2	+0.2
38	Columbia County	42.7	+0.1
38	Dodge County	42.7	+0.1
38	Taylor County	42.7	0
41	Jackson County	42.5	0
42	Ashland County	42.2	+0.3
43	Vernon County	41.8	0
44	Douglas County	41.7	0
45	Sheboygan County	41.6	+0.1
46	Chippewa County	41.4	+0.1
46	Sauk County	41.4	0
48	Fond du Lac County	41.3	+0.1
49	Marathon County	40.8	0
50	Lafayette County	40.6	+0.3
51	Racine County	40.5	+0.1
52	Jefferson County	40.3	+0.2
53	Trempealeau County	40.1	-0.1
53	Walworth County	40.1	+0.4
55	Calumet County	39.8	+0.2
56	Rock County	39.5	+0.1
57	Monroe County	39.4	+0.1
58	St. Croix County	39.1	+0.3
59	Winnebago County	38.6	+0.1
60	Kenosha County	38.2	+0.2
60	Outagamie County	38.2	+0.2
62	Clark County	37.7	-0.1
63	Portage County	37.6	+0.3
64	Pierce County	37.3	+0.1
65	Brown County	37.2	+0.1
66	Grant County	36.4	+0.5
67	La Crosse County	36.3	+0.3
68	Dunn County	35.3	+0.2
69	Dane County	35	+0.1
70	Milwaukee County	34.9	+0.3
71	Eau Claire County	34.8	+0.2
72	Menominee County	33	+0.5

Other periods

About this ranking

Age that divides the resident population of a US county into two halves of equal size on 1 July, from Census Bureau population estimates calculated by single year of age.

Counties only: the county file has no state or national medians, and medians cannot be added up. A single-year estimate, unlike median_age, which for US places is a five-year American Community Survey estimate.

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. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage (Counties in Wisconsin by median age on 1 July (US county estimates), 2017) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage, Counties in Wisconsin by median age on 1 July (US county estimates), 2017. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/wisconsin-counties?period=2017. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Counties in Wisconsin by median age on 1 July (US county estimates), 2017. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/wisconsin-counties?period=2017.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage, Counties in Wisconsin by median age on 1 July (US county estimates), 2017 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/median-age-july-1-us-counties/wisconsin-counties?period=2017 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_wisconsin_by_2017,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: median age (MEDIAN\_AGE\_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage: Counties in Wisconsin by median age on 1 July (US county estimates), 2017}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/wisconsin-counties?period=2017. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN\_AGE\_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}

RIS

TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage: Counties in Wisconsin by median age on 1 July (US county estimates), 2017
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/median-age-july-1-us-counties/wisconsin-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/wisconsin-counties?period=2017.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -

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Questions

Which county has the highest median age on 1 July (US county estimates)?

Iron County, with 55.7 years in 2017, according to the U.S. Census Bureau.

Which county has the lowest median age on 1 July (US county estimates)?

Menominee County, with 33 years in 2017.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Retrieved 2026-10-12.