Ridge Farm, IL has a population of 816 and is the 16,473rd largest city in the United States. The population density is 267 per sq mi which is 20% higher than the Illinois average and 195% higher than the national average. The median age in Ridge Farm is 45 which is approximately 20% higher than the Illinois average of 37. In Ridge Farm, 60% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 83% of Ridge Farm residents were born in Illinois, 16% were born out of state, 0% were born outside of the United States and 1% were foreign born.