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Green River, Wyoming
—  City  —
Downtown Green River, looking east at Flaming Gorge Way.
Location of Green River, Wyoming
Coordinates: 41°30′51″N 109°27′54″W / 41.51417°N 109.465°W / 41.51417; -109.465
Country United States
State Wyoming
County Sweetwater
 - Total 14.0 sq mi (36.3 km2)
 - Land 13.7 sq mi (35.5 km2)
 - Water 0.3 sq mi (0.8 km2)
Elevation 6,115 ft (1,864 m)
Population (2000)
 - Total 11,808
 - Density 861.5/sq mi (332.6/km2)
Time zone Mountain (MST) (UTC-7)
 - Summer (DST) MDT (UTC-6)
ZIP codes 82935, 82938
Area code(s) 307
FIPS code 56-33740[1]
GNIS feature ID 1589126[2]

Green River is a city in and the county seat of Sweetwater County, Wyoming, United States, in the southwestern part of the state.[3] The population was 11,808 at the 2000 census.

The city is known as being one of the first in the United States to ban door-to-door solicitation; see Green River Ordinance. [4]

The Mayor of Green River is Hank Castillion, who was elected in November 2006.



Construction of a railroad bridge over the Green River in 1868

Green River was incorporated in 1868 in what was then the Dakota Territory. The city was the starting point from which John Wesley Powell started his famous expeditions of the Green River, the Colorado River, and the Grand Canyon in the late 1800s. [5] Green River was originally supposed to be a the site of a division point for the Union Pacific Railroad, but when the railroad finally reached the point, officials were surprised to find that a city had already been established there. They moved the division point 12 miles (19 km) west to Bryan, Wyoming. [6]

At the time of its incorporation in 1868, Green River had about 2000 residents and permanent adobe buildings were being built. However, when the division point of the railroad was moved west, the city shrank to a mere 101 residents. Just when the city was on the verge of shriveling up, the Black Fork dried up during a drought and the railroad was forced to move the division point back to Green River. The town was officially incorporated under the new laws of Wyoming on May 5, 1891.


Green River, looking east.

The Green River Basin contains the world's largest known deposit of trona ore. Soda ash mining from trona veins 900 and 1,600 feet (490 m) deep is a major industrial activity in the area, employing over 2000 persons at five mines. The mining operation is less expensive for production of soda ash in the United States than the synthetic Solvay process, which predominates in the rest of the world. The trona in Sweetwater County was created by an ancient body of water known as Lake Gosiute. Over time, the lake shrunk. With the loss of outflows, highly alkaline water (salt brine) began to evaporate, depositing the beds of trona. [7]

The five mines are run by these companies:

The Green River Basin also has large oil shale and natural gas reserves, which remain virtually untouched due to the high cost of extracting the oil from the hard shale formations. However, an increase in oil prices in 2008 and a national desire to become more energy independent led to an increase in well drilling and oil exploration. Expansion growth from Halliburton and Exxon, as well as other oil companies, created a mini-boom for Green River and its sister city, Rock Springs.


Aerial view of Green River.
Green River
Climate chart (explanation)
average max. and min. temperatures in °F
precipitation totals in inches

Green River is located at 41°30′51″N 109°27′54″W / 41.51417°N 109.465°W / 41.51417; -109.465 (41.514189, -109.464926)[8]. The elevation is 6100 feet (1859 m) above sea level.

According to the United States Census Bureau, the city has a total area of 14.0 square miles (36.3 km²), of which, 13.7 square miles (35.5 km²) of it is land and 0.3 square miles (0.8 km²) of it (2.28%) is water.


Southeast Green River, from Mansface Hill.
Historical populations
Census Pop.  %±
1870 106
1880 327 208.5%
1890 723 121.1%
1900 1,361 88.2%
1910 1,313 −3.5%
1920 2,140 63.0%
1930 2,589 21.0%
1940 2,640 2.0%
1950 3,187 20.7%
1960 3,497 9.7%
1970 4,196 20.0%
1980 12,807 205.2%
1990 12,711 −0.7%
2000 11,808 −7.1%

As of the census[1] of 2000, there were 11,808 people, 4,177 households, and 3,212 families residing in the city. The population density was 861.5 people per square mile (332.5/km²). There were 4,426 housing units at an average density of 322.9/sq mi (124.6/km²). The racial makeup of the city was 92.13% White, 0.27% African American, 1.36% Native American, 0.32% Asian, 0.06% Pacific Islander, 4.23% from other races, and 1.63% from two or more races. Hispanic or Latino of any race were 10.21% of the population.

There were 4,177 households out of which 42.5% had children under the age of 18 living with them, 64.4% were married couples living together, 8.4% had a female householder with no husband present, and 23.1% were non-families. 19.3% of all households were made up of individuals and 6.0% had someone living alone who was 65 years of age or older. The average household size was 2.80 and the average family size was 3.22.

In the city the population was spread out with 31.1% under the age of 18, 8.8% from 18 to 24, 28.9% from 25 to 44, 24.8% from 45 to 64, and 6.5% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 102.8 males. For every 100 females age 18 and over, there were 100.7 males.

The median income for a household in the city was $53,164, and the median income for a family was $59,100. Males had a median income of $51,418 versus $24,306 for females. The per capita income for the city was $20,398. About 3.1% of families and 4.5% of the population were below the poverty line, including 6.0% of those under age 18 and 5.3% of those age 65 or over.

City council

Green River has an active city council whose members are elected by local residents via votes on ballots. The city council was recently criticized for its handling of a smoking ban, which caused several residents to question the council's motives.[10]


Public education in the city of Green River is provided by Sweetwater County School District #2. Schools serving the city include: Harrison Elementary, Jackson Elementary, Truman Elementary, Washington Elementary, Monroe Intermediate School, Lincoln Middle School, and Green River High School. There is also one alternative high school campus - Expedition Academy.

Flaming Gorge Days

Castle Rock.

Every year Green River hosts Flaming Gorge Days. The festival features concerts, 3 on 3 basketball, Red Desert Road Runner 5K race, Festival in the Park, among other activities. Past musical performances at the festival have included Poison, Tesla, Everclear, Head East, Neal McCoy, REO Speedwagon, Josh Gracin, Chris LeDoux and Trick Pony.[11]

Notable residents


  1. ^ a b "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.  
  2. ^ "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.  
  3. ^ "Find a County". National Association of Counties. Retrieved 2008-01-31.  
  4. ^ City of Green River - Railroad Workers Demand Protection of Their Daytime Sleep
  5. ^ City of Green River - About Green River
  6. ^ City of Green River - The Railroad Comes to Green River
  7. ^ City of Green River
  8. ^ "US Gazetteer files: 2000 and 1990". United States Census Bureau. 2005-05-03. Retrieved 2008-01-31.  
  9. ^ "Historical Decennial Census Population for Wyoming Counties, Cities, and Towns". Wyoming Department of State / U.S. Census Bureau. Retrieved 2008-06-30.  
  10. ^ 2007: A memorable year for GR Council
  11. ^ Flaming Gorge Days website
  12. ^ City of Green River

External links

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