Jonas Jones (May 19, 1791 – July 30, 1848) was a lawyer, judge, farmer, livestock breeder, and political figure in Upper Canada.

He supported bills which helped fund the development of the Welland Canal, and he was a member of a committee which recommended further improvements of transportation along the Saint Lawrence River.

With his brother Charles Jones, who represented Leeds in the Legislative Assembly, he operated mills at Furnace Falls (Lyndhurst).

He was a director of the Bank of Upper Canada branch at Brockville and, in 1834, became the president of the Saint Lawrence Inland Marine Assurance Company.

In 1833, he was appointed president of a commission to help improve navigation along the Saint Lawrence which met with American engineers and, in 1834, work began on a canal at Cornwall and other projects were planned.

In October of 1839, Jones took "no notice of petitions from the chiefs of the Six Nations" which attacked the credibility and character of young woman who had been raped by a Mohawk man named Noah Powlis.

In 1842, his daughter, Mary Elizabeth, married Lieutenant-General Charles Younghusband CB FRS, a British Army officer and meteorologist.