Erin Mills is a large suburban district in the city of Mississauga, Ontario, Canada, approximately 32 km (20 mi) west of Downtown Toronto.

Starting in the 1970s, Erin Mills was developed as a "new town" by the Cadillac Fairview Corporation on over 7,000 acres (28 km2) of farmland around Erin Mills Town Centre.

[1] Cadillac Fairview inherited the development from E. P. Taylor's Don Mills Development Corporation, which acquired land in the 1950s and coined the area's name.

[3] The name paid homage to the historic Erindale to the south as well as various mills along the Credit River to the east.

The closest mill was found along Eglinton Avenue in what was once Barberton, now a ghost town that once was built around the Toronto Woollen (Mills) Factory owned by brothers Robert and William Barber.