Louin, MS has a population of 381 and is the 21,140th largest city in the United States. The population density is 63 per sq mi which is 2% higher than the Mississippi average and 31% lower than the national average. The median age in Louin is 35 which is approximately 6% lower than the Mississippi average of 37. In Louin, 72% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 91% of Louin residents were born in Mississippi, 9% were born out of state, 0% were born outside of the United States and 0% were foreign born.