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

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

Milford, CT had the highest high school graduate or higher, population 25 and over of 21 cities in 2024, at 96.5%. Hartford, CT had the lowest, at 75.3%. The median was 88.1% and the figure for Connecticut was 91.5%. Source: the U.S. Census Bureau.

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Highest96.5Milford, CT
Lowest75.3Hartford, CT
Median88.121 cities
Connecticut91.5History

All cities, 2024

Milford, CT: 96.5 %Milford, CT96.5Groton, CT: 94.1 %Groton, CT94.1Middletown, CT: 93.8 %Middletown, CT93.8Bristol, CT: 93.4 %Bristol, CT93.4Shelton, CT: 92.9 %Shelton, CT92.9Naugatuck, CT: 91 %Naugatuck, CT91Ansonia, CT: 89.7 %Ansonia, CT89.7Torrington, CT: 89.1 %Torrington, CT89.1Norwalk, CT: 89 %Norwalk, CT89Stamford, CT: 88.8 %Stamford, CT88.8Derby, CT: 88.1 %Derby, CT88.1West Haven, CT: 87.8 %West Haven, CT87.8Norwich, CT: 87.5 %Norwich, CT87.5New Haven, CT: 87.4 %New Haven, CT87.4New London, CT: 87.2 %New London, CT87.2Meriden, CT: 86.4 %Meriden, CT86.4New Britain, CT: 83.5 %New Britain, CT83.5Danbury, CT: 83.4 %Danbury, CT83.4Waterbury, CT: 80.8 %Waterbury, CT80.8Bridgeport, CT: 77.6 %Bridgeport, CT77.6Hartford, CT: 75.3 %Hartford, CT75.3Milford, CT: 96.5 %Milford, CT96.5Groton, CT: 94.1 %Groton, CT94.1Middletown, CT: 93.8 %Middletown, CT93.8Bristol, CT: 93.4 %Bristol, CT93.4Shelton, CT: 92.9 %Shelton, CT92.9Naugatuck, CT: 91 %Naugatuck, CT91Ansonia, CT: 89.7 %Ansonia, CT89.7Torrington, CT: 89.1 %Torrington, CT89.1Norwalk, CT: 89 %Norwalk, CT89Stamford, CT: 88.8 %Stamford, CT88.8Derby, CT: 88.1 %Derby, CT88.1West Haven, CT: 87.8 %West Haven, CT87.8Norwich, CT: 87.5 %Norwich, CT87.5New Haven, CT: 87.4 %New Haven, CT87.4New London, CT: 87.2 %New London, CT87.2Meriden, CT: 86.4 %Meriden, CT86.4New Britain, CT: 83.5 %New Britain, CT83.5Danbury, CT: 83.4 %Danbury, CT83.4Waterbury, CT: 80.8 %Waterbury, CT80.8Bridgeport, CT: 77.6 %Bridgeport, CT77.6Hartford, CT: 75.3 %Hartford, CT75.3
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCities2024 (%)Change on 2023
1Milford, CT96.5+0.5 pts
2Groton, CT94.1+2.7 pts
3Middletown, CT93.8-0.6 pts
4Bristol, CT93.40 pts
5Shelton, CT92.9-1.1 pts
6Naugatuck, CT91+0.5 pts
7Ansonia, CT89.7+0.2 pts
8Torrington, CT89.1-0 pts
9Norwalk, CT89+0.1 pts
10Stamford, CT88.8+0.4 pts
11Derby, CT88.1-0.9 pts
12West Haven, CT87.8+0.1 pts
13Norwich, CT87.5-0.3 pts
14New Haven, CT87.4+1.4 pts
15New London, CT87.2-0.8 pts
16Meriden, CT86.40 pts
17New Britain, CT83.5+1.6 pts
18Danbury, CT83.4-0.3 pts
19Waterbury, CT80.8+0.4 pts
20Bridgeport, CT77.6-0.2 pts
21Hartford, CT75.3+1 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 Connecticut 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 Connecticut 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/connecticut-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 Connecticut 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/connecticut-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 Connecticut 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/connecticut-cities (Accessed: 12 October 2026).

BibTeX
@misc{census_cities_in_connecticut_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 Connecticut 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/connecticut-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 Connecticut 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/connecticut-cities
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/connecticut-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 Connecticut 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":"Connecticut","limit":10}
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Questions

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

Milford, CT, 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?

Hartford, CT, with 75.3% 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 Connecticut: more rankings