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

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

Howard County had the highest graduate or professional degree, population 25 and over of 24 counties in 2021, at 32.9%. Somerset County had the lowest, at 5.1%. The median was 14.5% and the figure for Maryland was 19.5%. Source: the U.S. Census Bureau.

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Highest32.9Howard County
Lowest5.1Somerset County
Median14.524 counties
Maryland19.5History

Map of counties, 2021

Allegany County: 8.2 %Anne Arundel County: 18.4 %Baltimore County: 17.8 %Calvert County: 16 %Caroline County: 7.5 %Carroll County: 14.6 %Cecil County: 10.2 %Charles County: 12.6 %Dorchester County: 9 %Frederick County: 18.4 %Garrett County: 11.8 %Harford County: 16 %Howard County: 32.9 %Kent County: 15.5 %Montgomery County: 32.5 %Prince George's County: 15.3 %Queen Anne's County: 14.4 %St. Mary's County: 14 %Somerset County: 5.1 %Talbot County: 18.4 %Washington County: 9.4 %Wicomico County: 11.7 %Worcester County: 12 %Baltimore city: 17 %
  • Under 9.9
  • 9.9 to 13
  • 13 to 15
  • 15 to 18
  • 18 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Howard County: 32.9 %Howard County32.9Montgomery County: 32.5 %Montgomery County32.5Frederick County: 18.4 %Frederick County18.4Talbot County: 18.4 %Talbot County18.4Anne Arundel County: 18.4 %Anne Arundel County18.4Baltimore County: 17.8 %Baltimore County17.8Baltimore city: 17 %Baltimore city17Harford County: 16 %Harford County16Calvert County: 16 %Calvert County16Kent County: 15.5 %Kent County15.5Prince George's County: 15.3 %Prince George's County15.3Carroll County: 14.6 %Carroll County14.6Queen Anne's County: 14.4 %Queen Anne's County14.4St. Mary's County: 14 %St. Mary's County14Charles County: 12.6 %Charles County12.6Worcester County: 12 %Worcester County12Garrett County: 11.8 %Garrett County11.8Wicomico County: 11.7 %Wicomico County11.7Cecil County: 10.2 %Cecil County10.2Washington County: 9.4 %Washington County9.4Dorchester County: 9 %Dorchester County9Allegany County: 8.2 %Allegany County8.2Caroline County: 7.5 %Caroline County7.5Somerset County: 5.1 %Somerset County5.1Howard County: 32.9 %Howard County32.9Montgomery County: 32.5 %Montgomery County32.5Frederick County: 18.4 %Frederick County18.4Talbot County: 18.4 %Talbot County18.4Anne Arundel County: 18.4 %Anne Arundel County18.4Baltimore County: 17.8 %Baltimore County17.8Baltimore city: 17 %Baltimore city17Harford County: 16 %Harford County16Calvert County: 16 %Calvert County16Kent County: 15.5 %Kent County15.5Prince George's County: 15.3 %Prince George's County15.3Carroll County: 14.6 %Carroll County14.6Queen Anne's County: 14.4 %Queen Anne's County14.4St. Mary's County: 14 %St. Mary's County14Charles County: 12.6 %Charles County12.6Worcester County: 12 %Worcester County12Garrett County: 11.8 %Garrett County11.8Wicomico County: 11.7 %Wicomico County11.7Cecil County: 10.2 %Cecil County10.2Washington County: 9.4 %Washington County9.4Dorchester County: 9 %Dorchester County9Allegany County: 8.2 %Allegany County8.2Caroline County: 7.5 %Caroline County7.5Somerset County: 5.1 %Somerset County5.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Howard County32.9
2Montgomery County32.5
3Frederick County18.4
4Talbot County18.4
5Anne Arundel County18.4
6Baltimore County17.8
7Baltimore city17
8Harford County16
9Calvert County16
10Kent County15.5
11Prince George's County15.3
12Carroll County14.6
13Queen Anne's County14.4
14St. Mary's County14
15Charles County12.6
16Worcester County12
17Garrett County11.8
18Wicomico County11.7
19Cecil County10.2
20Washington County9.4
21Dorchester County9
22Allegany County8.2
23Caroline County7.5
24Somerset County5.1

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 Maryland 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 Maryland 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/maryland-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 Maryland 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/maryland-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 Maryland 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/maryland-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maryland_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 Maryland 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/maryland-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 Maryland 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/maryland-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/graduate-or-professional-degree/maryland-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 Maryland 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?

Howard County, with 32.9% in 2021, according to the U.S. Census Bureau.

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

Somerset County, with 5.1% 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 Maryland: more rankings