Don Mills was a provincial electoral district in Ontario, Canada.

The riding was formally retired with the 1999 provincial election.

At its abolition, the riding consisted of the neighbourhoods of Woodbine Gardens and Parkview Hill in the borough of East York plus the neighbourhoods of Flemingdon Park and the southern part of Don Mills in North York (all of North York south of Lawrence Avenue).

The riding was a bastion of strength for the Progressive Conservative Party of Ontario for most of its history, and was represented by moderate Tory cabinet ministers Dennis Timbrell and David Johnson at different times.

The initial boundaries were the North York city limits on the south and east and west and Lawrence Avenue East formed the northern boundary.