Cerro Gordo, IL has a population of 1,404 and is the 13,086th largest city in the United States. The population density is 1,824 per sq mi which is 721% higher than the Illinois average and 1914% higher than the national average. The median age in Cerro Gordo is 38 which is approximately 2% higher than the Illinois average of 37. In Cerro Gordo, 63% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 88% of Cerro Gordo residents were born in Illinois, 11% were born out of state, 0% were born outside of the United States and 1% were foreign born.