Tadcaster Grammar School founded in 1557, is a coeducational comprehensive secondary school and sixth form located near Tadcaster, North Yorkshire, England, educating children aged 11–18 years old, and has an on-site sixth form.

[citation needed] By 1956, the school had become too big for its Tadcaster premises and started to expand into the current location when West Riding County Council acquired Toulston Lodge just outside the town.

[citation needed] As of 2024, Toulston Lodge retains its original fireplaces and skylight with wooden elephant surround.

Since Tadcaster is now in the district of Selby and Wetherby is in the City of Leeds, it is a difficult and bureaucratic process to educate pupils on the opposite side of the borderline to where they live.

The school is most commonly organised through horizontal year group forms, dictated by the five houses.

Another house, Wharfe, previously existed but was removed at the end of the 2019/2020 academic year; it was introduced at the same time as Toulston and was also named by students.