Elwood, IL has a population of 2,144 and is the 10,604th largest city in the United States. The population density is 330 per sq mi which is 48% higher than the Illinois average and 264% higher than the national average. The median age in Elwood is 43 which is approximately 16% higher than the Illinois average of 37. In Elwood, 64% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 86% of Elwood residents were born in Illinois, 12% were born out of state, 0% were born outside of the United States and 1% were foreign born.