Vinegar Hill (also Vinegar Hill Dip) is an unincorporated community in Markham, Ontario, Canada bounded by Highway 7 to the north, Highway 407 to the south, and streets just west and east of Main Street South, bordered by the Rouge River.

The name of the community is believed to be linked to a cider mill on the east side of the river valley or barrel makers that filled them with vinegar to test their straightness when rolling down Markham Road.

The Main Street Markham South Bridge was a small concrete beam girder bridge with 2 lanes of traffic traversed over the Rouge River and connected Vinegar Hill to the Historic Village of Markham (this 1946 bridge replaced three bridges (including one washed out during Hurricane Hazel in 1954) that crossed the Rouge on Princess Street, Mill Street and Markham Road).

There are three significant properties north of the bridge: There are two cemeteries on either side of Markham Road: The south end of community near Highway 407 is now home to a newer residential development.

Rouge Haven Parkette is a small city owned park on the east side of Markham Road.