Mark T. Sheehan High School
🇺🇸 Official data · 2025Wallingford, Connecticut 06492 · Wallingford School District
#75 of 180 high schools in Connecticut
#3102 of 16,910 nationally
About Mark T. Sheehan High School
Mark T. Sheehan High School is a public high located in Wallingford, in the Wallingford School District school district of Connecticut, United States. It caters for Grades 9–12. In 2025 it enrolled 673 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 70.8 out of 100, placing it in the top 25% of high schools in United States and 75th of 180 ranked high schools in Connecticut. Its strongest component is students per teacher (80th percentile), and its weakest is math proficiency (60th percentile).
Other published figures: enrollment 673.
There are 11 schools in Wallingford; Mark T. Sheehan High School ranks 5th of 11 scored schools there.
Success Index (US) breakdown
Each component is a percentile against high schools across United States.
- Math proficiency (30%)47%
- Reading proficiency (30%)67%
- Community advantage (fewer free/reduced-price lunch) (25%)31.5%
- Students per teacher (15%)11.2
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Mark T. Sheehan High School by the official sources.
- Enrollment
- 673
- Students enrolled in the latest NCES directory year.
- Free/reduced-price lunch
- 31.5%
- Share of students eligible for free or reduced-price lunch.
- Students per teacher
- 11.2
- Enrollment divided by FTE teachers; not class size.
- Reading proficiency
- 67%
- Share of tested students proficient or above (all students, all grades).
- Math proficiency
- 47%
- Share of tested students proficient or above (all students, all grades).
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Schools near Mark T. Sheehan High School
Closest schools by straight-line distance, with their Success Index (US).
James H. Moran Middle School
Wallingford · Public middle · Grades 6–8
531 students · 353 m away
Highland School
Wallingford · Public elementary · Grades PK–2
292 students · 433 m away
Mary G. Fritz Elementary School of Yalesville
Yalesville · Public elementary · Grades 3–5
265 students · 1.1 km away
Parker Farms School
Wallingford · Public elementary · Grades 2–5
268 students · 1.2 km away
Moses Y. Beach School
Wallingford · Public elementary · Grades PK–2
326 students · 3.3 km away
Cook Hill School
Wallingford · Public elementary · Grades PK–2
357 students · 3.7 km away
Hanover School
Meriden · Public elementary · Grades PK–5
456 students · 3.7 km away
Casimir Pulaski School
Meriden · Public elementary · Grades PK–5
539 students · 5.0 km away
Rock Hill School
Wallingford · Public elementary · Grades 3–5
278 students · 5.2 km away
Orville H. Platt High School
Meriden · Public high · Grades 9–12
1,191 students · 5.5 km away
Similar schools
Public high schools in Connecticut with a comparable Enrollment.
Plainville High School
Plainville · Public high · Grades 9–12
674 students
The Academy of Information Technology & Engineering
Stamford · Public high · Grades 9–12
658 students
Weston High School
Weston · Public high · Grades 9–12
691 students
New Fairfield High School
New Fairfield · Public high · Grades 9–12
693 students
Watertown High School
Watertown · Public high · Grades 9–12
693 students
Academy of International Studies 6-12
Bloomfield · Public high · Grades 6–12
697 students
Frequently asked questions
Is Mark T. Sheehan High School a good school?
Mark T. Sheehan High School has a Success Index (US) of 70.8 out of 100 (Top 25% of high schools in United States) and ranks #75 of 180 in Connecticut. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Mark T. Sheehan High School rank in Connecticut?
Mark T. Sheehan High School ranks #75 of 180 high schools in Connecticut and #3102 of 16,910 nationally on the Success Index (US) (2025 data).
How many students attend Mark T. Sheehan High School?
Mark T. Sheehan High School had 673 students in 2025.
Is Mark T. Sheehan High School a elementary school or a high school?
Mark T. Sheehan High School is classified as a high covering Grades 9–12. It is a public school.
What other schools are near Mark T. Sheehan High School?
There are 10 schools within 15 km of Mark T. Sheehan High School; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.