A−
Haddam-Killingworth High School
PublicHighGrades 9–12
95 Little City Road, Higganum, CT 06441 · (860) 345-8541 · Part of Regional School District 17
Students
466
Students per teacher
10:1
Free or reduced lunch
14%
Setting
Rural
Grades
9–12
What stands out about Haddam-Killingworth High School
- School Grade A−: near the top of Connecticut’s public schools
- Math proficiency 14 pts above the state
- Reading / language arts 31 pts above the state
- Small classes: 10:1 students per teacher
- Enrollment down 24.2% since 2020
Test scores
EDFacts via Urban Institute Education Data Portal (SY2020-21) · 2020–21Math proficiency52%
State average 37.9%
Reading / language arts82%
State average 50.7%
Location
Directions ↗
95 Little City Road, Higganum
Students
Enrollment by grade
Grade 996
Grade 10120
Grade 11130
Grade 12120
Enrollment over time
615’20
544’21
546’22
518’23
466’24
Down 24.2% since 2020.
Who goes here
White 88%Hispanic 5%Two or more races 3%Asian 2%Black 1%American Indian/Alaska Native <1%
As reported to NCES, share of students with a reported race or ethnicity.
What neighbors say
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Parents talk
Conversations in Town Square that mention Haddam-Killingworth High School.
Other schools in Regional School District 17
School facts: U.S. Department of Education (NCES), 2024-2025 school year. Scores: EDFacts via Urban Institute Education Data Portal (SY2020-21). The School Grade is our own summary of state test results. Neighbor ratings are opinions, not an official measure of school quality.