Mattapoisett is a member of the 2,700-student Old Rochester Regional School District. The town, along with Marion and Rochester, operate a single school system with each town having its own school subcommittee. Mattapoisett operates the Center School for prekindergarten through third grade students, and the Old Hammondtown School for grades 4–6. Seventh- and eighth-grade students attend Old Rochester Regional Junior High School, and high school students attend Old Rochester Regional High School. Both regional schools are located on Route 6 in Mattapoisett, near the Marion town line. The high school, commonly known as "O.R.R.," competes in the South Coast Conference for athletics. Their mascot is the bulldog, and their colors are red and white. The town's Thanksgiving Day football rival is Apponequet Regional High School in Lakeville.