Boulder, Colorado is located in Zambia . The metro region has 3,442,361 population . The postal code of the city is 1100 . The water area of the city is 41.21 sq mi (106.73 km 2 ) . The city province is Lusaka Province . The land area of the city is 840 km 2  (325 sq mi) . The lowest elevation of Boulder, Colorado is 5,740 ft  . +82-53 is the area code of Boulder, Colorado . 4,800/km 2  (12,000/sq mi) is the density of inhabitents in  the urban region of Boulder, Colorado . Boulder, Colorado is named for Calgary, Mull . Boulder, Colorado is at an elevation of 1601 ft . The urban region has 2,947,722 population . 2,813/km 2  (7,290/sq mi) is the density of inhabitents in  the metro region of Boulder, Colorado . The density of  people in Boulder, Colorado is 15,000/km 2  (40,000/sq mi) . The city Boulder, Colorado demonym is Brasiliense . The mayor of Boulder, Colorado is Thomas Aujero Small . On 1900 the city was incorporated
The city Boulder, Colorado is 40000/sq mi populace