Regent House School is a co-educational, controlled grammar school in Newtownards, County Down, Northern Ireland. The school comprises two parts: the grammar school and the preparatory department. Its current enrollment is 1486 (2024/25) students within the grammar school and 95 (2024/25) within the prep department.
Regent House considers itself to be non-denominational, however, its current statistics show students at the school to be 57% Protestant, 7% Roman Catholic and 36% other.
The school is divided into four houses: Castlereagh, Clandeboye, Scrabo and Strangford.
The school was inspected by the Controlled Schools' Support Council in 2015 and judged Satisfactory. In 2019 another inspection was carried out, but could not reach a judgement because of industrial action being taken by staff.
In 2017 the school's choir won BBC Radio Ulster School Choir of the Year. In 2024 the chamber choir placed third in the UK in the Barnardos National Choral Competition.