Westville, IL has a population of 3,303 and is the 8,331st largest city in the United States. The population density is 1,968 per sq mi which is 785% higher than the Illinois average and 2072% higher than the national average. The median age in Westville is 35 which is approximately 7% lower than the Illinois average of 37. In Westville, 49% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 88% of Westville residents were born in Illinois, 12% were born out of state, 0% were born outside of the United States and 1% were foreign born.