Le Roy, IL has a population of 3,570 and is the 7,956th largest city in the United States. The population density is 1,483 per sq mi which is 567% higher than the Illinois average and 1537% higher than the national average. The median age in Le Roy is 39 which is approximately 3% higher than the Illinois average of 37. In Le Roy, 63% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 83% of Le Roy residents were born in Illinois, 15% were born out of state, 1% were born outside of the United States and 1% were foreign born.