Marine, IL has a population of 872 and is the 16,012th largest city in the United States. The population density is 1,254 per sq mi which is 464% higher than the Illinois average and 1284% higher than the national average. The median age in Marine is 44 which is approximately 18% higher than the Illinois average of 37. In Marine, 62% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 81% of Marine residents were born in Illinois, 19% were born out of state, 0% were born outside of the United States and 0% were foreign born.