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 2021 Canadian Census was 6,098.