Data / Rankings / Graduate or professional degree, population 25 and over / Counties in Ohio

Counties in Ohio by graduate or professional degree, population 25 and over

Delaware County had the highest graduate or professional degree, population 25 and over of 88 counties in 2021, at 22.7%. Morgan County had the lowest, at 3.7%. The median was 6.8% and the figure for Ohio was 11.3%. Source: the U.S. Census Bureau.

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Highest22.7Delaware County
Lowest3.7Morgan County
Median6.888 counties
Ohio11.3History

Map of counties, 2021

Adams County: 7.5 %Allen County: 7.2 %Ashland County: 8.1 %Ashtabula County: 4.6 %Athens County: 18.8 %Auglaize County: 8.1 %Belmont County: 5.8 %Brown County: 5.4 %Butler County: 11.3 %Carroll County: 5.5 %Champaign County: 5.3 %Clark County: 7.5 %Clermont County: 10.8 %Clinton County: 7.3 %Columbiana County: 5.3 %Coshocton County: 5.9 %Crawford County: 5.5 %Cuyahoga County: 14.4 %Darke County: 5.7 %Defiance County: 7.2 %Delaware County: 22.7 %Erie County: 8.7 %Fairfield County: 10.6 %Fayette County: 5.7 %Franklin County: 15.7 %Fulton County: 5.9 %Gallia County: 6.9 %Geauga County: 13.8 %Greene County: 19.9 %Guernsey County: 5 %Hamilton County: 15.6 %Hancock County: 10.4 %Hardin County: 6.4 %Harrison County: 4.5 %Henry County: 5.8 %Highland County: 5.6 %Hocking County: 4.9 %Holmes County: 3.8 %Huron County: 4.7 %Jackson County: 5.5 %Jefferson County: 6.3 %Knox County: 8.2 %Lake County: 10.2 %Lawrence County: 6.4 %Licking County: 9.3 %Logan County: 6.1 %Lorain County: 9.4 %Lucas County: 10.4 %Madison County: 6.6 %Mahoning County: 8.8 %Marion County: 4.6 %Medina County: 12.1 %Meigs County: 4.1 %Mercer County: 6.9 %Miami County: 9.3 %Monroe County: 4.7 %Montgomery County: 11.6 %Morgan County: 3.7 %Morrow County: 4.3 %Muskingum County: 7.4 %Noble County: 4.2 %Ottawa County: 9.1 %Paulding County: 4.4 %Perry County: 4.7 %Pickaway County: 6.6 %Pike County: 5.1 %Portage County: 12.1 %Preble County: 7 %Putnam County: 8.1 %Richland County: 6.3 %Ross County: 6.4 %Sandusky County: 6.1 %Scioto County: 6.9 %Seneca County: 6.1 %Shelby County: 6.4 %Stark County: 8.3 %Summit County: 12.4 %Trumbull County: 6.7 %Tuscarawas County: 6.2 %Union County: 13.1 %Van Wert County: 6.6 %Vinton County: 3.8 %Warren County: 17.5 %Washington County: 7.7 %Wayne County: 9.1 %Williams County: 5.3 %Wood County: 14.6 %Wyandot County: 7.2 %
  • Under 5
  • 5 to 5.9
  • 5.9 to 6.8
  • 6.8 to 8.1
  • 8.1 to 11
  • 11 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Delaware County: 22.7 %Delaware County22.7Greene County: 19.9 %Greene County19.9Athens County: 18.8 %Athens County18.8Warren County: 17.5 %Warren County17.5Franklin County: 15.7 %Franklin County15.7Hamilton County: 15.6 %Hamilton County15.6Wood County: 14.6 %Wood County14.6Cuyahoga County: 14.4 %Cuyahoga County14.4Geauga County: 13.8 %Geauga County13.8Union County: 13.1 %Union County13.1Summit County: 12.4 %Summit County12.4Medina County: 12.1 %Medina County12.1Portage County: 12.1 %Portage County12.1Montgomery County: 11.6 %Montgomery County11.6Butler County: 11.3 %Butler County11.3Clermont County: 10.8 %Clermont County10.8Fairfield County: 10.6 %Fairfield County10.6Hancock County: 10.4 %Hancock County10.4Lucas County: 10.4 %Lucas County10.4Lake County: 10.2 %Lake County10.2Lorain County: 9.4 %Lorain County9.4Miami County: 9.3 %Miami County9.3Licking County: 9.3 %Licking County9.3Wayne County: 9.1 %Wayne County9.1Ottawa County: 9.1 %Ottawa County9.1Mahoning County: 8.8 %Mahoning County8.8Erie County: 8.7 %Erie County8.7Stark County: 8.3 %Stark County8.3Knox County: 8.2 %Knox County8.2Auglaize County: 8.1 %Auglaize County8.1Ashland County: 8.1 %Ashland County8.1Putnam County: 8.1 %Putnam County8.1Washington County: 7.7 %Washington County7.7Adams County: 7.5 %Adams County7.5Clark County: 7.5 %Clark County7.5Muskingum County: 7.4 %Muskingum County7.4Clinton County: 7.3 %Clinton County7.3Allen County: 7.2 %Allen County7.2Wyandot County: 7.2 %Wyandot County7.2Defiance County: 7.2 %Defiance County7.2Delaware County: 22.7 %Delaware County22.7Greene County: 19.9 %Greene County19.9Athens County: 18.8 %Athens County18.8Warren County: 17.5 %Warren County17.5Franklin County: 15.7 %Franklin County15.7Hamilton County: 15.6 %Hamilton County15.6Wood County: 14.6 %Wood County14.6Cuyahoga County: 14.4 %Cuyahoga County14.4Geauga County: 13.8 %Geauga County13.8Union County: 13.1 %Union County13.1Summit County: 12.4 %Summit County12.4Medina County: 12.1 %Medina County12.1Portage County: 12.1 %Portage County12.1Montgomery County: 11.6 %Montgomery County11.6Butler County: 11.3 %Butler County11.3Clermont County: 10.8 %Clermont County10.8Fairfield County: 10.6 %Fairfield County10.6Hancock County: 10.4 %Hancock County10.4Lucas County: 10.4 %Lucas County10.4Lake County: 10.2 %Lake County10.2Lorain County: 9.4 %Lorain County9.4Miami County: 9.3 %Miami County9.3Licking County: 9.3 %Licking County9.3Wayne County: 9.1 %Wayne County9.1Ottawa County: 9.1 %Ottawa County9.1Mahoning County: 8.8 %Mahoning County8.8Erie County: 8.7 %Erie County8.7Stark County: 8.3 %Stark County8.3Knox County: 8.2 %Knox County8.2Auglaize County: 8.1 %Auglaize County8.1Ashland County: 8.1 %Ashland County8.1Putnam County: 8.1 %Putnam County8.1Washington County: 7.7 %Washington County7.7Adams County: 7.5 %Adams County7.5Clark County: 7.5 %Clark County7.5Muskingum County: 7.4 %Muskingum County7.4Clinton County: 7.3 %Clinton County7.3Allen County: 7.2 %Allen County7.2Wyandot County: 7.2 %Wyandot County7.2Defiance County: 7.2 %Defiance County7.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Delaware County22.7
2Greene County19.9
3Athens County18.8
4Warren County17.5
5Franklin County15.7
6Hamilton County15.6
7Wood County14.6
8Cuyahoga County14.4
9Geauga County13.8
10Union County13.1
11Summit County12.4
12Medina County12.1
13Portage County12.1
14Montgomery County11.6
15Butler County11.3
16Clermont County10.8
17Fairfield County10.6
18Hancock County10.4
19Lucas County10.4
20Lake County10.2
21Lorain County9.4
22Miami County9.3
23Licking County9.3
24Wayne County9.1
25Ottawa County9.1
26Mahoning County8.8
27Erie County8.7
28Stark County8.3
29Knox County8.2
30Auglaize County8.1
31Ashland County8.1
32Putnam County8.1
33Washington County7.7
34Adams County7.5
35Clark County7.5
36Muskingum County7.4
37Clinton County7.3
38Allen County7.2
39Wyandot County7.2
40Defiance County7.2
41Preble County7
42Gallia County6.9
43Scioto County6.9
44Mercer County6.9
45Trumbull County6.7
46Van Wert County6.6
47Madison County6.6
48Pickaway County6.6
49Ross County6.4
50Hardin County6.4
50Lawrence County6.4
52Shelby County6.4
53Jefferson County6.3
54Richland County6.3
55Tuscarawas County6.2
56Sandusky County6.1
57Seneca County6.1
58Logan County6.1
59Fulton County5.9
60Coshocton County5.9
61Belmont County5.8
62Henry County5.8
63Darke County5.7
64Fayette County5.7
65Highland County5.6
66Jackson County5.5
67Carroll County5.5
68Crawford County5.5
69Brown County5.4
70Columbiana County5.3
71Champaign County5.3
71Williams County5.3
73Pike County5.1
74Guernsey County5
75Hocking County4.9
76Huron County4.7
76Perry County4.7
78Monroe County4.7
79Marion County4.6
80Ashtabula County4.6
81Harrison County4.5
82Paulding County4.4
83Morrow County4.3
84Noble County4.2
85Meigs County4.1
86Vinton County3.8
87Holmes County3.8
88Morgan County3.7

Other periods

About this ranking

People aged 25 and over whose highest degree is a master's, professional school or doctorate degree, as a percentage of all people aged 25 and over. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

A subset of bachelors_degree_share, which also counts people whose highest degree is a bachelor's.

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 B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. 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). American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs (Counties in Ohio by graduate or professional degree, population 25 and over, 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat

MLA 9

American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Ohio by graduate or professional degree, population 25 and over, 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Invokely, https://invokely.ai/rankings/graduate-or-professional-degree/ohio-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs. Counties in Ohio by graduate or professional degree, population 25 and over, 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Also distributed by Invokely, https://invokely.ai/rankings/graduate-or-professional-degree/ohio-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Ohio by graduate or professional degree, population 25 and over, 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat, via Invokely: https://invokely.ai/rankings/graduate-or-professional-degree/ohio-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_ohio_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Ohio by graduate or professional degree, population 25 and over, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/graduate-or-professional-degree/ohio-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Ohio by graduate or professional degree, population 25 and over, 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat
L2  - https://invokely.ai/rankings/graduate-or-professional-degree/ohio-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/graduate-or-professional-degree/ohio-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Retrieved 2026-10-12.
ER  -
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Rank Counties in Ohio by graduate or professional degree, population 25 and over using official data, and cite the source.
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Questions

Which county has the highest graduate or professional degree, population 25 and over?

Delaware County, with 22.7% in 2021, according to the U.S. Census Bureau.

Which county has the lowest graduate or professional degree, population 25 and over?

Morgan County, with 3.7% 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 B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs. Retrieved 2026-10-12.

Graduate or professional degree, population 25 and over: other rankings

Counties in Ohio: more rankings