Cowden, IL has a population of 534 and is the 19,158th largest city in the United States. The population density is 1,329 per sq mi which is 498% higher than the Illinois average and 1367% higher than the national average. The median age in Cowden is 44 which is approximately 18% higher than the Illinois average of 37. In Cowden, 52% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 87% of Cowden residents were born in Illinois, 13% were born out of state, 0% were born outside of the United States and 1% were foreign born.