1,900/km 2  (5,000/sq mi) is the density of residents in Alexandria .  31°12′N 29°55′E﻿ / ﻿31.200°N 29.917°E are the coordinates of the city. . (+20) 3 is the area code of Alexandria . The city Alexandria demonym is Alexandrian, Alexandrine (Arabic: إسكندراني‎) . Alexandria is at an elevation of 16 ft . The postal code of the city is 21500
PS use 21500 to post mail in the city