is a city in DeKalb County, Illinois, United States. Located in the north-east corner of the county, Genoa is located on the historic Galena-Chicago stagecoach route.
Genoa was settled as early as 1835 by Thomas Madison, an American Revolutionary War soldier from Ashtabula County, Ohio. He named Genoa after a town of the same name in New York. Genoa was incorporated as a village in 1876 and as a city on September 9, 1911.