Donovan is a village in Beaver Township, Iroquois County, Illinois, United States. The population was 251 at the 2020 census. Donovan was laid out in 1872 and named for the local Donovan family. Donovan is located in northeastern Iroquois County at 40°53′3″N 87°36′57″W / 40.88417°N 87.61583°W. U.S. Route 52 passes through the village, leading west …Donovan is a village in Beaver Township, Iroquois County, Illinois, United States. The population was 251 at the 2020 census. Donovan was laid out in 1872 and named for the local Donovan family. Donovan is located in northeastern Iroquois County at 40°53′3″N 87°36′57″W / 40.88417°N 87.61583°W. U.S. Route 52 passes through the village, leading west and north 30 miles to Kankakee and southeast 14 miles to Kentland, Indiana.