Jean-Joseph Trestler (c. 1757 – December 7, 1813) was a German-born businessman, land owner and political figure in Lower Canada. He represented York in the Legislative Assembly of Lower Canada from 1808 to 1809. His name also appears as Jean-Joseph Tröstler.
He was born in Mannheim, the son of Henry Tröstler and Magdeleine Feitten. Trestler came to Quebec in 1776 as a member of a German mercenary unit. He was discharged from the army in 1783 or earlier and became a peddler in Montreal. Trestler was married twice: to Marguerite Noël in 1785 and then to Marie-Anne-Joseph Curtius in 1794. In 1786, he purchased a home in the seigneury of Vaudreuil, where he operated a general store as well as a potash factory. He was also involved in the fur trade and transporting goods on the Ottawa River. He was able to acquire a substantial amount of property with the proceeds from his business operations. Trestler did not run for reelection to the assembly in 1809. He died in Vaudreuil.
- "Jean-Joseph Trestler". Dictionary of Canadian Biography (online ed.). University of Toronto Press. 1979–2005.