About This Place
Annawan is an incorporated town in Henry County, Illinois, United States. The population was 878 at the 2010 census.
Annawan is located at 41°23′50″N 89°54′32″W / 41.39722°N 89.90889°W / 41.39722; -89.90889 (41.397094, -89.908893).
According to the United States Census Bureau, the town has a total area of 0.7 square miles (1.8 km²), all of it land.