Mark T. Sheehan High School
| Name | Mark T. Sheehan High School |
| Grades | Class 09 to Class 12 |
| Address | 142 Hope Hill Road |
| City | Wallingford |
| School District | Wallingford School District |
| County | New Haven County |
| Zipcode | 06492-2254 |
| Phone No. | (203)294-5900 |
| State | Connecticut |
| Suburb | Large |
| Students | 760 |
| Teachers | 72 |
| Student Teacher Ratio | 10.5 students per teacher |
| Charter School | No |
| Magnet School | No |
Mark T. Sheehan High School is located at 142 Hope Hill Road in Wallingford city of New Haven County county in Connecticut. This school comes under Wallingford School District. You can call them at (203)294-5900 for more details. This is not a magnet school. Total seven hundred sixty students from class 09 to class 12 study in this school who are taught by seventy two teachers. This is not a charter school. The student teacher ratio of this school is 10.5.