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

Ottawa County had the highest median age on 1 July (US county estimates) of 88 counties in 2016, at 48.9 years. Athens County had the lowest, at 28.1 years. The median was 41.3 years. Source: the U.S. Census Bureau.

Highest48.9Ottawa County

Lowest28.1Athens County

Median41.388 counties

Map of counties, 2016

Under 39
39 to 40
40 to 41
41 to 42
42 to 44
44 and over

years, 2016. 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, 2016

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	2016 years	Change on 2015
1	Ottawa County	48.9	+0.3
2	Monroe County	46.2	+0.5
3	Harrison County	45.9	+0.1
4	Carroll County	45.3	+0.4
4	Erie County	45.3	+0.2
6	Geauga County	45	+0.3
7	Morgan County	44.7	+0.4
8	Jefferson County	44.6	+0.3
9	Belmont County	44.5	+0.4
10	Trumbull County	44.4	+0.2
11	Columbiana County	44.3	+0.3
12	Lake County	44.2	+0.3
13	Mahoning County	44.1	+0.3
13	Washington County	44.1	+0.2
15	Noble County	44	-1.1
16	Crawford County	43.8	+0.4
17	Meigs County	43.6	+0.2
18	Ashtabula County	43	+0.2
18	Hocking County	43	+0.4
20	Guernsey County	42.9	+0.2
21	Preble County	42.7	+0.3
22	Darke County	42.5	+0.2
23	Brown County	42.4	+0.3
23	Champaign County	42.4	+0.3
25	Lawrence County	42.3	+0.2
25	Medina County	42.3	+0.2
25	Sandusky County	42.3	+0.1
25	Wyandot County	42.3	+0.2
29	Vinton County	42.2	+0.2
30	Stark County	42.1	+0.1
31	Williams County	41.9	+0.1
32	Clark County	41.8	+0.1
32	Logan County	41.8	+0.1
32	Lorain County	41.8	+0.2
35	Coshocton County	41.7	-0.1
35	Richland County	41.7	-0.1
35	Tuscarawas County	41.7	0
38	Henry County	41.6	+0.2
38	Miami County	41.6	+0.1
38	Morrow County	41.6	+0.2
41	Adams County	41.5	+0.2
41	Paulding County	41.5	0
43	Marion County	41.4	+0.1
44	Fulton County	41.3	0
45	Auglaize County	41.2	0
45	Gallia County	41.2	0
45	Ross County	41.2	+0.2
48	Summit County	41.1	+0.1
48	Van Wert County	41.1	0
50	Pike County	41	0
51	Highland County	40.8	0
51	Madison County	40.8	+0.4
53	Defiance County	40.7	+0.1
53	Fayette County	40.7	0
55	Ashland County	40.6	+0.1
56	Muskingum County	40.5	+0.2
56	Scioto County	40.5	+0.3
58	Cuyahoga County	40.4	-0.1
58	Huron County	40.4	+0.3
60	Jackson County	40.3	+0.1
60	Perry County	40.3	+0.2
62	Licking County	40.1	0
63	Clinton County	40	+0.2
64	Clermont County	39.9	0
64	Seneca County	39.9	+0.1
66	Pickaway County	39.6	0
66	Putnam County	39.6	0
66	Shelby County	39.6	+0.4
69	Fairfield County	39.5	0
69	Knox County	39.5	+0.4
69	Montgomery County	39.5	-0.1
72	Hancock County	39.4	+0.1
73	Allen County	39.3	+0.2
73	Mercer County	39.3	-0.2
73	Warren County	39.3	+0.1
76	Wayne County	38.4	-0.1
77	Delaware County	38.3	+0.1
77	Portage County	38.3	+0.2
79	Lucas County	38.2	+0.1
80	Greene County	37.9	0
81	Union County	37.6	0
82	Butler County	36.8	+0.1
82	Hamilton County	36.8	0
84	Hardin County	36.7	+0.7
85	Wood County	35.7	+0.2
86	Franklin County	33.8	0
87	Holmes County	30.5	+0.3
88	Athens County	28.1	+0.2

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 Ohio by median age on 1 July (US county estimates), 2016) [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 Ohio by median age on 1 July (US county estimates), 2016. 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/ohio-counties?period=2016. 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 Ohio by median age on 1 July (US county estimates), 2016. 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/ohio-counties?period=2016.

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 Ohio by median age on 1 July (US county estimates), 2016 [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/ohio-counties?period=2016 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_ohio_by_2016,
  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 Ohio by median age on 1 July (US county estimates), 2016}},
  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/ohio-counties?period=2016. 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 Ohio by median age on 1 July (US county estimates), 2016
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/ohio-counties?period=2016
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/ohio-counties?period=2016.
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)?

Ottawa County, with 48.9 years in 2016, according to the U.S. Census Bureau.

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

Athens County, with 28.1 years in 2016.

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.