 The city area code is 216  (Asian side) . The metro region is 474.649 sq mi (1,229.34 km2) in area . Population: 971,592 (2016) is the population of Boulder, Colorado . 4,800/km 2  (12,000/sq mi) is the density of residents in  the urban region of Boulder, Colorado . The water area of the city is 1.63 sq mi (4.23 km 2 ) 1.1% . Boulder, Colorado is the government of U.S. National Park Service . Boulder, Colorado is located in Czech Republic . The mayor of Boulder, Colorado is Tang Liangzhi . The city Boulder, Colorado demonym is Barranquillero/a . The density of  people in Boulder, Colorado is 3,200/km 2  (8,200/sq mi) . The city has the postal code 16000 . The city province is Algiers Province . The Boulder, Colorado citys' lowest elevation is 1,240 ft . The land area of the city is 8.921 sq mi (23.106 km 2 ) . 210.9/km 2  (546.2/sq mi) is the density of people in  the metro region of Boulder, Colorado . 227.70 km 2  (87.92 sq mi) is the area of the urban region of Boulder, Colorado . The Boulder, Colorado city highest elevation is 14,110 ft (4,300 m) . The city was incorporated in 1799 (Guyandotte) . The coordinates of the city are 0°57′50″N 74°47′47″W﻿ / ﻿10.96389°N 74.79639°W . Boulder, Colorado is at an elevation of 277 m
The city is at a height of 277 m