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Superior, Colorado
Rock Creek Ranch subdivision in Superior
Rock Creek Ranch subdivision in Superior
Location in Boulder County and the state of Colorado
Location in Boulder County and the state of Colorado
Country  United States
State  State of Colorado
Counties Boulder County, Jefferson County
Founded 1896
Incorporated June 10, 1904
 • Type Statutory Town
 • Total 4 sq mi (10.2 km2)
 • Land 4 sq mi (10.2 km2)
 • Water 0 sq mi (0 km2)
5,495 ft (1,675 m)
 • Total 12,483
 • Density 3,120.8/sq mi (1,223.8/km2)
Time zone UTC-7 (MST)
 • Summer (DST) UTC-6 (MDT)
ZIP code
Area code(s) Both 303 and 720
FIPS code 08-75640
GNIS feature ID 0203891
Highways US 36, SH 128, SH 170
Website Town Website

Superior is a Statutory Town in Boulder County in the U.S. state of Colorado, with a small, uninhabited segment of land area extending into Jefferson County . According to the 2010 census, the population of the city was 12,483.


Superior's history is one of coal mining. The first mines in the area were developed in the late 19th century. Coal was discovered on the Hake family farm in 1894, and recollections of members of pioneer families in Superior, including the Hakes and Autreys, are preserved as part of the Maria Rogers Oral History Program at the Carnegie Library for Local History in Boulder, Colorado. The town was reportedly named after Superior, Wisconsin.

Mining was the major force in Superior's history until the Industrial Mine closed in 1945. Subsequently, many people moved out of the area and the Town evolved into a quiet ranching and farming community. The Town's population hovered around 250 until the late 1990s.


Superior is located at 39°56′N 105°10′W / 39.933°N 105.167°W / 39.933; -105.167 (39.931190, -105.159085).

According to the United States Census Bureau, the town has a total area of 4.0 square miles (10.3 km²), of which, 4.0 square miles (10.2 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.50%) is water.

As of 2013 there were 27 miles (43.45 km) of trails and 594 acres (2.40 km²) of parks, green space, and open space, which is about 23.2% of the land area.


Historical population
Census Pop.
1910 349
1920 233 −33.2%
1930 160 −31.3%
1940 205 28.1%
1950 134 −34.6%
1960 173 29.1%
1970 171 −1.2%
1980 208 21.6%
1990 255 22.6%
2000 9,011 3,433.7%
2010 12,483 38.5%
Est. 2015 12,980 4.0%
U.S. Decennial Census

As of the census of 2010, there were 12,483 people, 4,484 households (for 2007-2011), and 3,159 families residing in the town. The population density was 3,120.8 people per square mile (1,223.8/km²). There were 4,698 housing units at an average density of 1,186.4 per square mile (458.1/km²). The racial makeup of the town was 80.4% White, 0.9% African American, 0.2% Native American, 13.8% Asian, less than 0.1% Pacific Islander, 1.00% from other races, and 3.7% from two or more races. Hispanic or Latino of any race were 6.6% of the population.

Of all households, 46.6% had children under the age of 18 living with them, 57.9% were married couples living together, 8.1% had a female householder with no husband present, and 29.7% were non-families. 20.0% of all households were individuals living alone and 1.6% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.31.

In the town, the population was spread out with 31.5% under the age of 18, 12.9% from 18 to 24, 33.4% from 25 to 44, 24.1% from 45 to 64, and 3.1% who were 65 years of age or older. The median age was 32.5 years. For every 100 females there were 103.0 males. For every 100 females age 18 and over, there were 101.1 males.

The median income for a household in the town was $100,194, and the median income for a family was $119,115. The per capita income for the town was $44,318 (for 2007-2011). About 1.4% of families and 4.3% of the population were below the poverty line, including 3.1% of those under age 18 and none of those age 65 or over.

Of residents 25 years and over, 97.5% were high school graduates and 71.8% held a bachelor's degree or higher, with 26.8% holding graduate or professional degrees.

In popular culture

Sections of the 1985 movie American Flyers were filmed in Superior.

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