Thomas Long (August 7, 1836 – October 9, 1920) was an Ontario merchant and political figure.

He represented Simcoe West in the Legislative Assembly of Ontario as a Conservative from 1875 to 1883.

Long moved to Collingwood in 1857, where he managed a store for merchants before going into business for himself the following year.

In 1868, his brother joined him in the business, which include the sale of dry goods, clothing and groceries, a flour mill and steamboats.

This article about an Ontario Progressive Conservative Party MPP is a stub.