Compton County is an historical county in southeastern Quebec, Canada on the western flanks of the Appalachian Mountains on the US-Canadian border. It is in the Montérégie region of the province and was named in 1893 after a town in Surrey, England by British officers who were convinced of the agricultural potential of the area. The county seat is Cookshire . Mount Megantic (altitude 1111 m) has an observatory operated by the University of Montreal at its peak, which is accesible only from an adjacent county. In the early 1980s the County was disolved, most of it becoming part of the MRC de Le Haut-Saint-François except for the southern portion which went to MRC de Coaticook.