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 2015, at 54.4 years. Menominee County had the lowest, at 32.5 years. The median was 42.9 years. Source: the U.S. Census Bureau.

Highest54.4Iron County

Lowest32.5Menominee County

Median42.972 counties

Map of counties, 2015

Under 38
38 to 41
41 to 43
43 to 45
45 to 49
49 and over

years, 2015. 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, 2015

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	2015 years	Change on 2014
1	Iron County	54.4	+0.8
2	Vilas County	54.3	+0.6
3	Door County	52.6	+0.6
3	Florence County	52.6	+0.7
5	Adams County	52.2	+0.4
5	Burnett County	52.2	+0.4
7	Bayfield County	52	+0.2
8	Price County	51.2	+0.3
9	Oneida County	50.9	+0.4
10	Washburn County	50.6	+0.7
11	Sawyer County	50.4	+0.6
12	Marquette County	49.5	+0.2
13	Rusk County	48.6	+0.5
13	Waushara County	48.6	+0.3
15	Langlade County	48.5	+0.5
16	Marinette County	48.1	+0.5
17	Lincoln County	47.1	+0.3
18	Forest County	46.8	+0.5
19	Oconto County	46.3	+0.3
20	Crawford County	46	+0.3
21	Buffalo County	45.9	+0.3
21	Green Lake County	45.9	+0.2
21	Pepin County	45.9	+0.3
24	Juneau County	45.4	+0.2
25	Waupaca County	45.3	+0.2
26	Polk County	45	+0.5
27	Shawano County	44.9	+0.4
28	Richland County	44.7	+0.6
29	Manitowoc County	44.6	+0.2
30	Barron County	44.4	0
31	Ozaukee County	44.1	-0.1
31	Wood County	44.1	+0.1
33	Kewaunee County	44	+0.2
34	Waukesha County	43.3	+0.2
35	Iowa County	43.1	+0.4
36	Taylor County	42.9	+0.2
36	Washington County	42.9	+0.3
38	Green County	42.8	+0.2
39	Columbia County	42.6	+0.2
40	Dodge County	42.3	+0.2
41	Jackson County	42.2	0
42	Vernon County	42	+0.1
43	Ashland County	41.7	+0.5
44	Douglas County	41.5	+0.3
45	Sauk County	41.3	+0.1
45	Sheboygan County	41.3	0
47	Chippewa County	41.1	+0.1
47	Fond du Lac County	41.1	+0.2
49	Marathon County	40.6	+0.2
49	Trempealeau County	40.6	-0.3
51	Lafayette County	40.3	0
51	Racine County	40.3	+0.1
53	Jefferson County	39.8	+0.2
54	Calumet County	39.4	0
54	Walworth County	39.4	+0.4
56	Rock County	39.3	+0.2
57	Monroe County	39.2	-0.1
58	St. Croix County	38.5	+0.3
59	Winnebago County	38.4	+0.3
60	Clark County	37.9	+0.1
60	Outagamie County	37.9	+0.2
62	Kenosha County	37.7	+0.2
63	Portage County	37	+0.3
64	Brown County	36.9	+0.1
64	Pierce County	36.9	+0.4
66	Grant County	35.7	-0.2
66	La Crosse County	35.7	+0.2
68	Dane County	34.8	+0.2
68	Dunn County	34.8	+0.2
70	Eau Claire County	34.4	+0.3
70	Milwaukee County	34.4	+0.2
72	Menominee County	32.5	+0.4

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), 2015) [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), 2015. 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=2015. 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), 2015. 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=2015.

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), 2015 [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=2015 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_wisconsin_by_2015,
  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), 2015}},
  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=2015. 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), 2015
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=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/wisconsin-counties?period=2015.
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 54.4 years in 2015, according to the U.S. Census Bureau.

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

Menominee County, with 32.5 years in 2015.

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.