Genoa, IL has a population of 4,930 and is the 6,546th largest city in the United States. The population density is 2,016 per sq mi which is 807% higher than the Illinois average and 2125% higher than the national average. The median age in Genoa is 40 which is approximately 8% higher than the Illinois average of 37. In Genoa, 52% of the population over 15 years of age are married, 93% speak English and 5% speak Spanish. 77% of Genoa residents were born in Illinois, 19% were born out of state, 1% were born outside of the United States and 4% were foreign born.