Coordinates: 50°25′48″N 4°55′30″W / 50.430°N 4.925°W
Tregatillian is a hamlet immediately east of St. Columb Major in Cornwall, England, United Kingdom. The area is currently the site of a few traditional Cornish houses and a large residential mobile home site, Tregatillian Homes Park.
Author Cyril Bencraft Joly once lived in the village.