Joice is a city in Worth County, Iowa, United States. The population was 231 at the 2000 census. It is part of the Mason City Micropolitan Statistical Area.
Joice is located at 43°21′48″N 93°27′21″W / 43.36333°N 93.45583°W / 43.36333; -93.45583 (43.363223, -93.455881).
According to the United States Census Bureau, the city has a total area of 1.0 square miles (2.6 km²), all of it land.