Caitlin Compton Gregg (born November 7, 1980) is an American cross-country skier who has competed since 2001.

Gregg starting Nordic skiing at Harwood Union High School in Duxbury, Vermont, as a sophomore.

Gregg's best finish at the FIS Nordic World Ski Championships was third in the 10 km freestyle in Falun in 2015.

Gregg is the only five-time winner, male or female, of the American Birkebeiner ski marathon.

Gregg set the course record in the women's freestyle technique in 2011 with a winning time of 2:15:26.0.