The water area of the city is 4.12 sq mi (10.67 km 2 ) . The city land area is 840 km 2  (325 sq mi) . Boulder, Colorado is located in Zulia . Boulder, Colorado is at an elevation of 3264 ft . The demonym of the city Boulder, Colorado is Medellinense  ,  Paisa . The postal code of the city is 080020 . The coordinates of the city are 6°13′51″N 75°35′26″W﻿ / ﻿6.23083°N 75.59056°W . The density of  inhabitents in Boulder, Colorado is 630/sq km  (1,600/sq mi) . The density of  people in  the urban region of Boulder, Colorado is 2,305/km 2  (5,970/sq mi) . The Boulder, Colorado city highest elevation is 2,715 m (8,907 ft) . The Boulder, Colorado citys' lowest elevation is 620 ft . 2,452,656 is the population of the metro region of Boulder, Colorado . The mayor of Boulder, Colorado is Rafael Greca (PMN) . 1,352.5/km 2  (3,527/sq mi) is the density of people in  the metro region of Boulder, Colorado . On September 20, 1917 the city was incorporated . This city is named after John Hunt . Boulder, Colorado is the government of Ministry of Culture . Boulder, Colorado has Population: 1,747,152 population . +374 10 is the area code of Boulder, Colorado . The area of the urban region is 1,770 sq mi (4,600 km 2 )
There are less than 2209 inhabitents per sq km in the urban region of Boulder, Colorado