| Clementi Town Secondary School | |
| Native Name: | 锦文中学 Sekolah Menengah Clementi Town |
| Motto: | Aspire and Grow |
| Streetaddress: | 10 Clementi Avenue 3, Singapore 129904 |
| Country: | Singapore |
| Coordinates: | 1.3155°N 103.7623°W |
| Type: | Government Co-educational |
| Session: | Single session |
| Principal: | Rasidah Binte Rahim |
| Enrolment: | ~1,350 |
| City/Town: | Clementi |
| School Code: | 3029 |
| Homepage: | clementitownsec.moe.edu.sg |
Clementi Town Secondary School (CTSS) is a government secondary school located in Clementi, Singapore, founded in the 1980s.
The school was officially opened on 22 July 1982 by the then-Member for Parliament of Clementi Bernard Chen Tien Lap.[1] In 1984, in order to prevent students loitering in public places, the school's prefects, in cooperation with the Students' Care Service, set up a location for students to relax and study after school hours. This centre was the first of its kind in secondary schools in Singapore.[2]