Meredosia, IL has a population of 1,029 and is the 14,970th largest city in the United States. The population density is 1,236 per sq mi which is 456% higher than the Illinois average and 1264% higher than the national average. The median age in Meredosia is 42 which is approximately 13% higher than the Illinois average of 37. In Meredosia, 73% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 92% of Meredosia residents were born in Illinois, 8% were born out of state, 0% were born outside of the United States and 0% were foreign born.