Leonore, IL has a population of 90 and is the 27,195th largest city in the United States. The population density is 1,013 per sq mi which is 356% higher than the Illinois average and 1018% higher than the national average. The median age in Leonore is 48 which is approximately 28% higher than the Illinois average of 37. In Leonore, 49% of the population over 15 years of age are married, 91% speak English and 6% speak Spanish. 90% of Leonore residents were born in Illinois, 4% were born out of state, 2% were born outside of the United States and 3% were foreign born.