Data / Rankings / High school graduate or higher, population 25 and over / Cities in Maine

Cities in Maine by high school graduate or higher, population 25 and over, 2024

Portland, ME had the highest high school graduate or higher, population 25 and over of 11 cities in 2024, at 96.5%. Lewiston, ME had the lowest, at 91.1%. The median was 94.6% and the figure for Maine was 94.8%. Source: the U.S. Census Bureau.

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Highest96.5Portland, ME
Lowest91.1Lewiston, ME
Median94.611 cities
Maine94.8History

All cities, 2024

Portland, ME: 96.5 %Portland, ME96.5Saco, ME: 96.5 %Saco, ME96.5Westbrook, ME: 96.3 %Westbrook, ME96.3Bangor, ME: 96 %Bangor, ME96South Portland, ME: 95.9 %South Portland, ME95.9Biddeford, ME: 94.6 %Biddeford, ME94.6Augusta, ME: 94.2 %Augusta, ME94.2Auburn, ME: 92.9 %Auburn, ME92.9Waterville, ME: 91.7 %Waterville, ME91.7Sanford, ME: 91.3 %Sanford, ME91.3Lewiston, ME: 91.1 %Lewiston, ME91.1Portland, ME: 96.5 %Portland, ME96.5Saco, ME: 96.5 %Saco, ME96.5Westbrook, ME: 96.3 %Westbrook, ME96.3Bangor, ME: 96 %Bangor, ME96South Portland, ME: 95.9 %South Portland, ME95.9Biddeford, ME: 94.6 %Biddeford, ME94.6Augusta, ME: 94.2 %Augusta, ME94.2Auburn, ME: 92.9 %Auburn, ME92.9Waterville, ME: 91.7 %Waterville, ME91.7Sanford, ME: 91.3 %Sanford, ME91.3Lewiston, ME: 91.1 %Lewiston, ME91.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCities2024 (%)Change on 2023
1Portland, ME96.5+0.7 pts
2Saco, ME96.5+0.7 pts
3Westbrook, ME96.3+0.6 pts
4Bangor, ME96+0.3 pts
5South Portland, ME95.9+0.5 pts
6Biddeford, ME94.6+0.2 pts
7Augusta, ME94.2-0.5 pts
8Auburn, ME92.9+1 pts
9Waterville, ME91.7+0.3 pts
10Sanford, ME91.3+0.7 pts
11Lewiston, ME91.1+1.3 pts

Other periods

About this ranking

People aged 25 and over who hold a regular high school diploma, a GED or alternative credential, or any higher level of education, 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.

Measures the adult population, not students: it is not the high school graduation rate of a class. Not comparable with the EU share below upper secondary education, which covers ages 25 to 64.

Every value in the ranking comes from the same publisher and the same period, so the cities 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 high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, US cities (incorporated places of 10,000 or more). https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-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 high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, US cities (incorporated places of 10,000 or more) (Cities in Maine by high school graduate or higher, population 25 and over, 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat

MLA 9

American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, US cities (incorporated places of 10,000 or more), Cities in Maine by high school graduate or higher, population 25 and over, 2024. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat. Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/maine-cities. 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 high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, US cities (incorporated places of 10,000 or more). Cities in Maine by high school graduate or higher, population 25 and over, 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat. Also distributed by Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/maine-cities.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, US cities (incorporated places of 10,000 or more), Cities in Maine by high school graduate or higher, population 25 and over, 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat, via Invokely: https://invokely.ai/rankings/high-school-graduate-or-higher/maine-cities (Accessed: 12 October 2026).

BibTeX
@misc{census_cities_in_maine_by_2024,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, US cities (incorporated places of 10,000 or more): Cities in Maine by high school graduate or higher, population 25 and over, 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/maine-cities. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, US cities (incorporated places of 10,000 or more). https://www2.census.gov/programs-surveys/acs/summary\_file/2024/table-based-SF/data/5YRData/acsdt5y2024-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 high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, US cities (incorporated places of 10,000 or more): Cities in Maine by high school graduate or higher, population 25 and over, 2024
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat
L2  - https://invokely.ai/rankings/high-school-graduate-or-higher/maine-cities
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/maine-cities.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, US cities (incorporated places of 10,000 or more). https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat. Retrieved 2026-10-12.
ER  -
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Rank Cities in Maine by high school graduate or higher, population 25 and over using official data, and cite the source.
rank_places {"indicator":"high_school_graduate_share","level":"municipality","within":"Maine","limit":10}
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Questions

Which city has the highest high school graduate or higher, population 25 and over?

Portland, ME, with 96.5% in 2024, according to the U.S. Census Bureau.

Which city has the lowest high school graduate or higher, population 25 and over?

Lewiston, ME, with 91.1% in 2024.

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 high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, US cities (incorporated places of 10,000 or more). Retrieved 2026-10-12.

High school graduate or higher, population 25 and over: other rankings

Cities in Maine: more rankings