Daniel McLachlin (1810 – February 6, 1872) was a businessman and political figure in Canada West. He represented Renfrew South in the 1st Canadian Parliament as a Liberal from 1867 to 1869.He was born in Pointe-Fortune in Lower Canada in 1810 and had entered the timber trade in the Ottawa Valley by 1834. In 1837, he moved to Bytown and purchased cutting rights along the Ottawa River, Madawaska River and Indian Rivers. He built sawmills and gristmills at the Chaudière Falls on the Ottawa.