| Choi Hung Estate Catholic Secondary School | |
| Native Name: | 彩虹邨天主教英文中學 |
| Motto: | SPES SALUS (Latin: Hope and Salvation) |
| Location: | 1 Tse Wai Avenue, Kowloon, Hong Kong |
| Coordinates: | 22.335°N 114.2067°W |
| Type: | Subsidised School |
| Religious Affiliation: | Roman Catholic Diocese of Hong Kong |
| Founder: | Roman Catholic Diocese of Hong Kong |
| Status: | Open |
| District: | Wong Tai Sin |
| Principal: | Ms. He Jia xin |
| Staff: | 80 |
| Grades: | 6 |
| Gender: | Male |
| Lower Age: | 13 |
| Upper Age: | 19 |
| Classrooms: | 24 |
| Nickname: | 彩天 |
Choi Hung Estate Catholic Secondary School is a boy's secondary school situated in Choi Hung Estate, Wong Tai Sin, Hong Kong. Established on 28 February 1965 by Roman Catholic Diocese of Hong Kong.
School enrolled new students at Pui Shing Catholic Secondary School from March to August, and received them fees at Wong Tai Sin Catholic Primary School. In the early year, there were only 440 boys in 11 classes from form 1 to form 3, and 14 teachers. In first academic year, school shared its school building with Sanpokong Catholic Secondary School. On 28 February 1965, school was opened and inaugurated by Bishop Bianchi. 1967, there were already 847 boys in 22 classes from form 1 to form 5.