+82-53 is the area code of Boulder, Colorado . The lowest elevation of Boulder, Colorado is 1,750 m . 2,947,722 is the population of the urban region of Boulder, Colorado . The city has the postal code 1100 . Boulder, Colorado is located in Zambia . On 1900 the city was incorporated . The demonym of the city Boulder, Colorado is Brasiliense . The city water area is 41.21 sq mi (106.73 km 2 ) . The land area of the city is 840 km 2  (325 sq mi) . The mayor of Boulder, Colorado is Thomas Aujero Small . 15,000/km 2  (40,000/sq mi) is the density of people in Boulder, Colorado . The density of  inhabitents in  the metro region of Boulder, Colorado is 2,813/km 2  (7,290/sq mi) . The density of  inhabitents in  the urban region of Boulder, Colorado is 4,800/km 2  (12,000/sq mi) . This city is named after Calgary, Mull . Boulder, Colorado is at an elevation of 488 m . The metro region has 3,442,361 population . The city province is Lusaka Province
3446596 residents live in the metro region of Boulder, Colorado