Grant County Map, Washington


Written and Fact-checked by | Updated On: February 17, 2026, 14:47 ET

Map of Grant County - Grant County is a county located in the U.S. state of Washington. Grant County Map showing cities, highways, important places and water bodies. Get Where is Grant County located in the map, major cities in Grant county, population, areas, and places of interest.

Map of Grant County, Washington

Map of Grant County, Washington

About Grant County Map, Alabama: The map showing the county boundary, county seat, major cities, highways, water bodies and neighbouring counties.

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  • About Grant County, Washington

    Grant County is located in the central part of Washington, United States. Established in 1909, the county was named after Ulysses S. Grant, the 18th President of the United States. The county seat is Ephrata, while Moses Lake is the largest city and serves as a major economic center in the region.

    Population

    According to the United States Census Bureau, the population of Grant County was 99,123 as recorded in the 2020 Census. The county has experienced growth driven by agriculture, food processing, and regional industry, with many residents living in Moses Lake and surrounding communities.

    Area and Geography

    According to the United States Census Bureau, Grant County covers a total area of approximately 2,791 square miles, including about 2,680 square miles of land and 111 square miles of water. The county lies within the Columbia Basin and includes irrigated farmland, lakes, and semi-arid terrain shaped by large-scale reclamation projects.

    Bordering Counties

    Grant County shares borders with Okanogan County to the north, Douglas County to the east, Adams County to the south, Lincoln County to the southeast, Kittitas County to the west, and Yakima County to the southwest.

    Major Cities and Communities

    The principal cities in Grant County include Moses Lake, Ephrata, Quincy, and Soap Lake. Moses Lake is the largest city and serves as a regional center for commerce, industry, and recreation.

    Attractions and Recreation

    Grant County offers outdoor recreation opportunities centered around Moses Lake and the Columbia Basin. Boating, fishing, camping, and water sports are popular activities. The region is also known for its agricultural landscapes and access to nearby state parks and natural areas.

    Transportation

    Major transportation routes serving Grant County include Interstate 90, State Route 17, and State Route 28, connecting the county to Spokane, Seattle, and other parts of Washington.

    Explore more counties in Washington Counties or view the complete USA States Map section for additional geographic information.

    Sources:

    Population and area data sourced from the United States Census Bureau (2020 Census). General county information referenced from the Official Grant County Government Website.

    Facts about Grant County, Washington

    CountryUnited States
    StateWashington
    RegionCentral Washington
    County SeatEphrata
    Named AfterUlysses S. Grant (18th U.S. President)
    Established1909
    Organized1909
    Coordinates47.2000° N, 119.4500° W
    Total Area2,791 sq mi
    Land Area2,681 sq mi
    Water Area110 sq mi
    Population (2020)99,123
    Population RankMid-sized county in Washington
    Largest CityMoses Lake
    Main IndustriesAgriculture, Food Processing, Manufacturing, Renewable Energy
    Major HighwaysInterstate 90, State Route 17, State Route 28
    Time ZonePacific Time (UTC−08:00)
    Known ForColumbia Basin Project, Irrigated farmland, Moses Lake
    Websitehttps://www.grantcountywa.gov

    Top Attractions in Grant County, Washington

    • Sun Lakes–Dry Falls State Park – Dramatic basalt cliffs and lakes.
    • Dry Falls – Massive ancient waterfall site.
    • Soap Lake – Mineral-rich lake and shoreline.
    • Moses Lake – Boating, fishing, and recreation.
    • Potholes State Park (nearby) – Sand dunes and reservoirs.
    • Columbia National Wildlife Refuge – Desert lakes and birding.
    • Wanapum Dam & Heritage Center – River views and culture.
    • Ginkgo Petrified Forest State Park (nearby) – Petrified wood exhibits.
    • Japanese Peace Garden (Moses Lake) – Quiet lakeside garden.
    • Soap Lake Natural Spa – Historic mineral baths.
    • Grant County Historical Museum – Local history displays.
    • Columbia Basin Farmlands – Expansive agricultural scenery.

    Cities & Towns in Grant County, Washington

    Moses Lake, Ephrata, Quincy, Grand Coulee, Soap Lake, Coulee City, Royal City, Warden, Mattawa, George, Grant County Rural Communities