Almonte is a former mill town in Lanark County, in the eastern portion of Ontario, Canada. Formerly a separate municipality, Almonte is a ward of the town of Mississippi Mills, which was created on January 1, 1998, by the merging of Almonte with Ramsay and Pakenham townships. Almonte is 46 kilometres (29 mi) south-west of downtown Ottawa. Its population as recorded in the 2016 Canadian Census was 5,039.

Lanark County is a county located in the Canadian province of Ontario. Its county seat is Perth, which was first settled in 1816 and was known as a social and political capital before being over shadowed by what we now know as Ottawa.