Established in 1965 as Sanpokong Catholic College, the school is a government subsidizedgrammar school for boys, under the sponsorship of the Catholic Diocese of Hong Kong.
Before moving into the new premises, with consent of the school authority of Choi Hung Estate Catholic Secondary School (CHESS), CHECSS was partially used by Ng Wah School in its first year of operation, with a total of 480 junior form students (S1 to S3) in 12 classes.
On 30 March 1966, the present site in San Po Kong were completed and were inaugurated by the then Governor of Hong Kong, Sir David Trench on 14 April 1966.
After a donation by Mr. Ng Ping Kin, an architect and Urban Councillor, the school was renamed Ng Wah College in commemoration of his father, Mr. Ng Wah [zh] (Chinese: 伍華). In the late 1970s, the rooftop of the secondary school building was modified and became the 6th floor to accommodate the then expanding student population.
In 1986, three standard classrooms were also in place in the covered playground. Under the School Improvement Project scheme, a new six-storey annex was built connected the primary school building near Choi Hung Rd. in 2000. In the same year, the three classrooms in the covered playground were converted into a bigger multi-purpose Student Activity Room.
Starting from September 2002, the school was renamed as Ng Wah Catholic Secondary School in accordance with the naming system of schools under the sponsorship of the Hong Kong Catholic Diocese.
Admission
A total of 75% of Ng Wah Catholic Secondary School's Form 1 intake is from its feeder school, Ng Wah Catholic Primary School, with 25% from other primary schools
Motto
The school motto is the Latin phrase "IN CONSILIO SAPIENTIA", which means "To think conscientiously and to discern with intelligence" in English.
Notable alumni
The alumni association is called Ng Wah College – Secondary Old Boys Association, Limited.
