The borough's board of education informed the Chatham Township in 1953 district that the high school would not be able to accommodate township students after the 1959-60 school year, leading the township's board of education to consider establishing a regional district or constructing its own high school. Voters in Chatham Township approved the building of a high school in September 1960, with a referendum to spend $1,750,000 in a bond offering passing by a 4-1 margin and completion expected in time for the 1962-63 school year.
Chatham Township High School opened to students in September 1962 for grades seven through nine, with students still in Chatham Borough High School completing their education there. The graduating class of 1911, the school's first, included six students. The class of 1988, with a total of 105 seniors, was the 76th and final graduating class of the borough's high school. The Chatham Borough High School building was repurposed as the Chatham Borough Hall. ==Athletics==