Thorold Secondary School, often abbreviated asTSS, is a publicsecondary school inThorold,Ontario,Canada.^[1][2] The school was named after SirJohn Thorold, a member of the British Parliament forLincolnshire, England. It is the only high school in the city.^[3]

Thorold Secondary School
A photograph of the school taken in 2024.
Address
50 Ormond Street North Thorold , Ontario , L2V 1Z1 Canada
Information
School type	Public Secondary school
Motto	Summum Petite (Seek the Highest!)
Founded	1875
School board	District School Board of Niagara
Superintendent	Leanne Smith
Area trustee	Nancy Beamer
Principal	Janice Sargeant
Grades	9-12
Language	English
Area	Thorold, Ontario
Colour(s)	Purple and Gold
Website	tss.dsbn.org

In 1857, a grammar school was established in the village of Thorold, but it was not until 18 years later, in 1875, that the land on which the present high school stands was purchased. The site, bound by Ormond, St. David and Carleton Streets, was purchased for $1856.77 from Dr. Rolls of Thorold, and the building was erected at a cost of $6000. In 1928, a seven-room and gymnasium addition was constructed, and the building was officially opened on the eve of the graduation ceremonies held on November 22, 1929. The 2011-2012 school year was a significant one for TSS, as it took part in a review of all secondary schools in southern St. Catharines and Thorold.^[4]

In 2012,District School Board of Niagara trustees voted on whether to close the school and decided to keep it open.^[3]

• Education in Ontario
• List of secondary schools in Ontario

• District School Board of Niagara

43°07′46″N79°11′55″W / 43.12933°N 79.19855°W /43.12933; -79.19855