 Kelly is situated along the Gros Ventre River on the eastern side of the Jackson Hole valley, is part of the Jackson, WY–ID Micropolitan Statistical Area and has a US Post Office with zip code 83011.According to the United States Census Bureau, the CDP has a total area of 0.48 square miles (1.24 km²), all of which is land.Kelly has a humid continental climate (Dfb) bordering on a subarctic climate (Dfc) with warm to hot summers and very cold winters.