 It shares a border with Denver and Englewood on the north, Greenwood Village on the northeast, Centennial on the east, Highlands Ranch on the south, Columbine and Columbine Valley on the west, and Bow Mar on the northwest.As of the 2010 census, there were 41,737 people, 18,312 households, and 10,724 families residing in the city.The population density was 3,215.5 people per square mile (1,242.2/km²).