New Sarpy, LA has a population of 1,296 and is the 13,572nd largest city in the United States. The population density is 1,106 per sq mi which is 1147% higher than the Louisiana average and 1121% higher than the national average. The median age in New Sarpy is 32 which is approximately 11% lower than the Louisiana average of 36. In New Sarpy, 44% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 88% of New Sarpy residents were born in Louisiana, 11% were born out of state, 0% were born outside of the United States and 1% were foreign born.