For the 2026 school year, there are 3 public preschools serving 1,215 students in Groton, CT.
The top-ranked public preschools in Groton, CT are Thames River Magnet School, Charles Barnum Magnet School and Catherine Kolnaski Magnet School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Groton, CT public preschools have an average math proficiency score of 46% (versus the Connecticut public pre school average of 37%), and reading proficiency score of 53% (versus the 42% statewide average). Pre schools in Groton have an average ranking of 4/10, which is in the bottom 50% of Connecticut public pre schools.
Minority enrollment is 57% of the student body (majority Hispanic), which is less than the Connecticut public preschool average of 60% (majority Hispanic).
Best Public Preschools in Groton, CT (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Thames River Magnet School
Magnet School
(Math: 50-54% | Reading: 50-54%)
Rank:
Rank:
6/
Top 50%10
250 Brandegee Avenue
Groton, CT 06340
(860) 980-8230
Groton, CT 06340
(860) 980-8230
Gr: PK-5 | 501 students Student-teacher ratio: 12:1 Minority enrollment: 60%
Rank: #22.
Charles Barnum Magnet School
Magnet School
(Math: 40-44% | Reading: 55-59%)
Rank:
Rank:
6/
Top 50%10
68 Briar Hill Rd.
Groton, CT 06340
(860) 449-5640
Groton, CT 06340
(860) 449-5640
Gr: PK-5 | 339 students Student-teacher ratio: 12:1 Minority enrollment: 49%
Rank: #33.
Catherine Kolnaski Magnet School
Magnet School
(Math: 40-44% | Reading: 50-54%)
Rank:
Rank:
5/
Bottom 50%10
500 Poquonnock Rd.
Groton, CT 06340
(860) 449-5608
Groton, CT 06340
(860) 449-5608
Gr: PK-5 | 375 students Student-teacher ratio: 12:1 Minority enrollment: 62%
Frequently Asked Questions
What are the top-ranked public preschools in Groton, CT?
The top-ranked public preschools in Groton, CT include Thames River Magnet School, Charles Barnum Magnet School and Catherine Kolnaski Magnet School.
How many public preschools are located in Groton?
3 public preschools are located in Groton.
What is the racial composition of students in Groton?
Groton public preschools minority enrollment is 57% of the student body (majority Hispanic), which is less than the Connecticut public preschools average of 60% (majority Hispanic).
Which public preschools in Groton are often viewed compared to one another?
Popular comparisons of public preschools in Groton include: Thames River Magnet School vs. Charles Barnum Magnet School, Charles Barnum Magnet School vs. Thames River Magnet School
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