Thomas Charles Cossitt (15 November 1923 – 15 March 1982) was a Canadian politician.
Born in Brockville, Ontario, the son of Edwin Comstock Cossitt and Marjorie Helen Delahaye, he graduated from St. Andrew's College and received a Bachelor of Arts degree from the University of Toronto.
In the 1974 election, he was quoted in the Montreal Gazette as saying "Instant bilingualism is not only stupid and arrogant, it's just plain nuts".
Cossitt stressed that while he supported both official languages, it was necessary to consider the financial burden of the Trudeau government's new policies.
[1] Cossitt, who had two previous heart attacks, collapsed from a third heart attack during a photo session at the annual directors' meeting of the Leeds-Grenville Progressive Conservative Riding Association on the evening of 15 March 1982.