Timaru Boys' High School (also known as TBHS), established in 1880, is a single sex state (public) secondary school located in the port city of Timaru, South Canterbury, New Zealand.

These include cross country, athletics, swimming sports, singing, volleyball, basketball and quadball tournaments.

[3] TBHS plays in 5 traditional interschool fixtures: The Timaru Boys' High School 1st XV competes in the Crusaders' Region Secondary Schools' Rugby Championship "The UC Cup."

The Thomas House boarding hostel is attached to and is an integral part of the school.

Built in 1907, Thomas House, named after the school's first rector, welcomed in its first eight boarders in 1908.