Sorrento, LA Profile: Facts, Map & Data. Sorrento, Louisiana - Basic Facts. The Town of Sorrento had a population of 1,589 as of July 1, 2016. The primary coordinate point for Sorrento is located at latitude 30.1836 and longitude -90.8666 in Ascension Parish. The formal boundaries for the Town of Sorrento (see map below) encompass a land area of 3.64 sq. miles and a water area of 0.04 sq. miles.