Grand Isle, county (194 sq mi/502 sq km; 1990 pop. 5,318), NW Vt., on a peninsula and several isls. in L. Champlain; North Hero; 44°47'N 73°17'W. Dairying, apples, lumber; resorts. Includes North Hero Isl., Grand Isle, and Isle La Motte, site of states 1st Eur. settlement (c.1665). Organized 1802.
Capital city or county seat is shown by the symbol