Gregg River
The Gregg River from Alberta Highway 40
Location
Country	Canada
Province	Alberta
Physical characteristics
Source
• location	Gregg River Headwaters
• coordinates	53°07′20″N 117°28′44″W / 53.12222°N 117.47889°W / 53.12222; -117.47889
• elevation	1,489 m (4,885 ft)
Mouth
• location	McLeod River
• coordinates	53°17′28″N 117°16′52″W / 53.29111°N 117.28111°W / 53.29111; -117.28111
• elevation	1,161 m (3,809 ft)

The Gregg River is a short river in west-central Alberta, Canada. The river is named after John James Gregg (1840–1941), a prospector and trapper prominent in the area.^[1]

The Gregg River forms at the confluence of a number of minor creeks near the Cardinal River Coal Mine, at the base of Mount Sir Harold Mitchell. The river then flows northwest, taking on a number of tributary creeks before joining the McLeod River, which in turn flows into the Athabasca River. The Gregg is bridged by Alberta Highway 40.

• Berry's Creek
• Sphinx Creek
• Drinnan Creek
• Warden Creek
• Teepee Creek
• Wigwam Creek

• List of Alberta rivers