Cairo is located in Angkor, Siem Reap, Cambodia . Cairo is at an elevation of 4593 ft . The metro region has 16,100,000 population . Cairo is named for Moses Cleaveland . The area of the city is 2,121 km 2  (819 sq mi) . The coordinates of the city are 7°23′47″N 3°55′0″E﻿ / ﻿7.39639°N 3.91667°E . The city water area is 0.37 sq mi (0.95 km 2 ) . The lowest elevation of Cairo is 1,750 m . The area of the urban region is Area : 993.5 km2 (383.6 sq mi) . +57 2 is the area code of Cairo . The city was incorporated in March 6, 1836 (city) . The density of  residents in Cairo is 350/sq mi (140/km 2 ) . 6,600/km 2  (17,000/sq mi) is the density of people in  the metro region of Cairo . 3,300/km 2  (8,600/sq mi) is the density of residents in  the urban region of Cairo . Christian Roger Okemba (PCT) is the mayor of Cairo . The demonym of the city Cairo is Evanstonian . The highest elevation of Cairo is 1,879 m (6,165 ft)
The urban region is more than 733 km2