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Superior, Colorado
Rock Creek Ranch subdivision in Superior
Rock Creek Ranch subdivision in Superior
Location of Superior in Boulder County and Jefferson County, Colorado
Location of Superior in Boulder County and Jefferson County, Colorado
Country  United States
State  Colorado
Counties Boulder County, Jefferson County
Founded 1896
Incorporated June 10, 1904
 • Type Statutory Town
 • Total 3.96 sq mi (10.27 km2)
 • Land 3.93 sq mi (10.17 km2)
 • Water 0.04 sq mi (0.10 km2)
5,495 ft (1,675 m)
 • Total 13,094
 • Estimate 
 • Density 3,331.72/sq mi (1,286.42/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, Colorado, United States, with a small, uninhabited segment of land area extending into Jefferson County. According to the 2020 census, the population of the city was 13,094.


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%
2020 13,094 4.9%

As of the 2020 United States census, there were 13,094 people and 4,424 households in Superior. Additional demographic information is available from the US Census profile of Superior and US Census Quick Facts about Superior. Data here are from the 2020 census and 2020 American Community Survey (ACS) 5-year estimates for 2016-2020.

Age distribution estimates showed 5.6% of the population under age 5, 29.2% under age 18, 6.6% from 18 to 24, 28.5% from 25 to 44, 28.4% from 45 to 64, and 7.4% 65 or older. Females were 50.9% of the population, and the median age was 36.3 years.

The racial makeup of the town was 76.1% White alone, 69.9% White alone and not Hispanic or Latino, 18.8% Asian alone, 6.9% Hispanic or Latino, and 3.6% two or more races, with less than 1% in any other category. A language other than English was spoken at home by 20.1% of the population.

Family and household characteristics included 65.0% married-couple families, 13.0% family households with a male householder and no spouse present, and 16.9% family households with a female householder and no spouse present. The average household size was 2.87 and the average family size was 3.36.

Housing characteristics estimates indicated the population density was 3,332 people per square mile (1,287/km2). Of the 5,025 housing units, 61.5% were owner-occupied. The median value of owner-occupied housing units for 2016-2020 was $603,600. The median gross rent for the same period was $2,060.

The median income for a household (in 2020 dollars) for 2016-2020 was $126,600 +/- $15,678, and median per capita income was $50,932. The employment rate was 75.3%. About 4.0% of the population were living below the poverty line, and 3.6% were without health care coverage.

Education characteristics of residents 25 years and over were that 94.9% were high school graduates, 76.2% held a bachelor's degree or higher, and 33.2% held a graduate or professional degree.

In popular culture

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


Superior is part of the Boulder Valley School District (BVSD) and is home to two public schools: Superior Elementary and Eldorado PK-8. The home public high school is Monarch High School in neighboring Louisville. Nearby institutions of higher education include the University of Colorado at Boulder, Naropa University in Boulder, and Front Range Community College campuses in Longmont and Westminster.

Notable people

  • Marcelo Balboa – soccer star
  • Josh Sims – Lacrosse player
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