Thomas Bonia (1856 – September 25, 1926) was a mariner and politician in Newfoundland.
By 1876, he was master of his own vessel and was involved in the cod fishery in the Strait of Belle Isle and the Grand Banks from 1880 to 1884.
In 1894, he became commander of the ship providing mail and passenger service for Placentia Bay.
He was elected to the Newfoundland assembly in 1900, reelected in 1904 and retired from politics in 1908.
Bonia was then appointed to the Legislative Council of Newfoundland and was named Minister of Posts and Telegraphs.