Prien, LA has a population of 7,903 and is the 4,738th largest city in the United States. The population density is 1,336 per sq mi which is 1406% higher than the Louisiana average and 1374% higher than the national average. The median age in Prien is 36 which is approximately 1% lower than the Louisiana average of 36. In Prien, 68% of the population over 15 years of age are married, 90% speak English and 0% speak Spanish. 77% of Prien residents were born in Louisiana, 17% were born out of state, 0% were born outside of the United States and 6% were foreign born.