Resident Population in Grand Isle County, VT was 7.46700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Grand Isle County, VT reached a record high of 7.65700 in January of 2008 and a record low of 3.57400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Grand Isle County, VT - last updated from the United States Federal Reserve on May of 2024.