County Transportation Metrics is a project of the Washington State Association of Counties (WSAC) and will provide a roadmap for setting transportation priorities.

Grant County

Grant County was created out of Douglas County in 1902. Grant is the fourth largest county in the state in terms of land area, but is sparsely populated. It is located toward the central-eastern edge of the state in the Columbia Basin. The Grand Coulee Dam , the largest electric power-producing facility in the United States, is on the north-end of the county. The county seat is at Ephrata and its largest city is Moses Lake.

Grant County is mostly flat, making it ideal for raising livestock on dry grassland. Grant County has been heavily vested in ranching and agriculture. Fruit and crop farming developed later, as railroads and dams reshaped the area.  Agriculture continues to play a large role and has spurred associated food processing industries. Some of the biggest food manufacturers are found in Grant County, including Quincy Foods, Con Agra, JR Simplot, and many others. Local government (including the Moses Lake School District and Grant County PUD) is the area's second largest employer. A few construction and manufacturing companies are also major employers.

Key to the area's economy is the airport at Moses Lake – the former Larson Air Force Base, which was transformed for civilian use in 1966. In addition to freight and cargo services, the airport is widely known as a training facility for commercial and military pilots.

The area's low-cost electricity, abundance of land and easy access to Interstate 90 is also making it attractive to software and manufacturing firs.

Population (OFM Databook, 2011) 

Population (2011) 90,100
Population Change (2000 to 2010)      2.4%
Land Area (Sq. Mi.) 2,679.51
Density (Population/Sq. Mi.) 33.63


Coulee City                                                
Electric City 1,065
Ephrata 7,690
George 690
Grand Coulee   1,020
Moses Lake
Royal City
Soap Lake 1,515
Wilson Creek

Major Highways

  • Interstate 90
  • US Route 2
  • State Route 17
  • State Route 28

County Roads (CRAB and OFM, 2011)

Total Center Lane Miles
Maintenance Expenditures
$ 11,967,004
Preservation Expenditures
$ 4,895,812
Improvement Expenditures

County Revenues  & Expenditures (OFM Databook, 2011)

Total Revenues
$ 98,191,583
Total Expenditures
$ 73,701,431
Transportation Expenditures
$ 12,186,589


Performance Measures

Links & Sources

Washington State Association of Counties
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