Emanuel Thomas Essery, KC (1843 – March 25, 1937) was a lawyer and politician in Ontario, Canada. He served as mayor of London, Ontario from 1893 to 1894. The son of William H. Essery, he was born in London, Canada West and was educated there and at Toronto University. Essery was president of the London & Port Stanley Railway. He ran unsuccessfully for the London seat in the Canadian House of Commons in 1894. He served during the Fenian raids. Essery married Eliza Jane Wales. In 1908, he was named King's Counsel. He died in Toronto at the age of 94.