Waitaki Boys' High School is a secondary school for boys located in the northern part of the town of Oamaru, Otago, New Zealand, with day and boarding facilities, and was founded in 1883.

The school is notable for its British colonial architecture, encompassing such historic buildings such as the Hall of Memories, an assembly hall, built to honour its former pupils who died in various wars.

The main, and oldest block of the school is named after Denis Blundell.

The idea of establishing a boys' high school in Oamaru originated with Samuel Shrimski, who was one of the two members of parliament representing the Waitaki electorate.

[6] The following is a complete list of the rectors of Waitaki Boys' High School: