The Hart Ranges are a major subrange of the Canadian Rockies located in northeastern British Columbia and western Alberta.

The Hart Ranges were named in honour of British Columbia Premier John Hart, as is the highway which traverses the Pine Pass in the northern part of the range, connecting the north-central Interior of the province to the Peace River Regional District to the northeast.

Official subdivisions of the Hart Ranges include the: Other areas of the Hart Ranges have no subdesignations though the area around Mount Sir Alexander has been dubbed the Mount Sir Alexander Group by The Canadian Mountain Encyclopedia; however, this is not an official designation.

The Hart Ranges are the location of a number of large coal mines focused on the remote communities of Tumbler Ridge and Chetwynd.

The southernmost tip of the mountain range is preserved within Kakwa Provincial Park and Protected Area.