Palmerston (population 2,518 as of 2001) is a community located at the south end of the Town of Minto, Ontario, in northern part of Wellington County in southern Ontario, Canada.
When the railroad decided to build a junction and maintenance sheds between Guelph, Harriston and Listowel, this also included a station. One of the active supporters of the railroad was John McDermott, Reeve of Wallace and, because of this support, the railways decided to let McDermot name the station. He named it Palmerston in 1870 in honour of Henry John Temple, the future third Viscount Palmerston. As soon as the railroad decided where it would build, people started buying property around the area for businesses and homes.
In 1995, the Progressive Conservative government of Ontario began to reduce the number of total municipalities in the province. Effective 1 Jan. 1999, The Town of Minto is composed of the former towns of Harriston and Palmerston, the former village of Clifford, and the surrounding rural area of the former Minto Township.
Older documents show how this process has simplified local maps.