Herron's Mills, originally known as Gillies Mills, is a ghost town in the municipality of Lanark Highlands, Lanark County in Eastern Ontario, Canada, near the community of Lanark. It is located on highway 511 between Perth and Calabogie, Ontario. Businessman John Gillies established a sawmill on the Clyde River in the community in 1842 to supply lumber for construction in the area. The mill continued to operate until 1950. It was later purchased by the Herron Brothers, hence the name.
