Thomas Ridout (March 17, 1754 – February 8, 1829) was a political figure in Upper Canada.

In 1810, he was appointed to the post of Surveyor-General for Upper Canada in 1807, replacing Charles Burton Wyatt and Joseph Bouchette.

In 1812, he was elected to the Legislative Assembly of Upper Canada representing East York and Simcoe.

He served on the board set up to deal with claims for compensation for losses sustained during the War of 1812.

[2] In 1890 she published Ten years of Upper Canada in peace and war, 1805–1815, an edited collection of letters between Ridout and his sons George and Thomas Gibbs.