Chatsworth, IL has a population of 1,007 and is the 15,102nd largest city in the United States. The population density is 373 per sq mi which is 68% higher than the Illinois average and 312% higher than the national average. The median age in Chatsworth is 34 which is approximately 9% lower than the Illinois average of 37. In Chatsworth, 60% of the population over 15 years of age are married, 87% speak English and 2% speak Spanish. 71% of Chatsworth residents were born in Illinois, 16% were born out of state, 2% were born outside of the United States and 11% were foreign born.