Grand Isle County is a county in the U.S. state of Vermont. As of the 2020 census, the population was 7,293, making it Vermont's second-least populous county. Its shire town is North Hero. The county was created in 1802 and organized in 1805.

North Hero is a town in and the shire town of Grand Isle County, Vermont, United States. The population was 939 at the 2020 census.