[1] The town of Seymour began building its first public high school in 1884 on Bank Street.

When the school first opened in the fall of 1886, it had 456 students, who all attended class in nine rooms.

That building and its annex are now listed on the National Register of Historic Places.

[5] Seymour High School is part of the Naugatuck Valley League(NVL) and the Connecticut Interscholastic Athletic Conference (CIAC).

In 2004, Seymour Softball set a Connecticut state record for the most wins in a season (28).