Where is Newcastle, Washington

Written and Fact-checked by | Updated On: August 5, 2026

Newcastle is a city in western Washington, located in King County between Bellevue and Renton. It sits about 10 miles southeast of downtown Seattle and overlooks parts of Lake Washington and the Cascade Range. The city is known for its former coal-mining history, Newcastle Beach Park, and wooded hills. Its location places it within the fast-growing Seattle metropolitan area.

Location Map of Newcastle, King County, Washington

Where is Newcastle Located in King County, Washington

About Map: The map shows the location of Newcastle in King County, in the U.S. state of Washington.

Newcastle Map, Washington

About Newcastle Map: The Google Map highlights the location of Newcastle in King County, Washington. Use the zoom, satellite, and street-view options to explore the city's neighborhoods, roads, and nearby places.

Where is Newcastle Located?

Newcastle is a city located in King County, Washington, the United States. It lies on the Eastside of the Seattle metropolitan area, about 10 miles southeast of downtown Seattle and roughly 5 miles southeast of Bellevue. Renton is about 5 miles south, while Issaquah is around 10 miles east. Newcastle is positioned near 47.539° North latitude and 122.156° West longitude. The 2020 Census recorded 13,017 residents. The city covers about 4.40 square miles, or 11.40 square kilometers, including land and water. Newcastle's hills provide views toward Lake Washington, Seattle, and the Cascade Mountains. Newcastle Beach Park is one of the area's waterfront attractions, while the Cougar Mountain Regional Wildland Park provides nearby hiking and natural scenery. The community developed around coal mining during the 19th century, and remnants of that history remain visible in the surrounding landscape. Newcastle incorporated as a city in 1994. A unique fact about Newcastle is that it was once one of the most important coal-producing communities in the Pacific Northwest, with rail lines carrying coal to the Seattle waterfront.

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Newcastle City Facts

CityNewcastle
StateWashington
CountyKing County
CountryUnited States
RegionPuget Sound and Seattle Eastside
Incorporated1994
Founded1863
Total Area4.40 sq mi (11.40 sq km)
Land Area4.37 sq mi (11.32 sq km)
Water Area0.03 sq mi (0.08 sq km)
Elevation420 ft (128 m)
Population (2023 estimate)About 13,500
Population (2020 Census)13,017
Population Density2,979 people per sq mi
Time ZonePacific Time (PST/PDT)
ZIP Codes98059
Area Code425
Major HighwaysI-405, Coal Creek Parkway SE, and Newcastle Way
Public TransitKing County Metro
Major AttractionsNewcastle Beach Park, Coal Creek Falls, Cougar Mountain Regional Wildland Park, and Newcastle Historic Coal Mine sites
Official Websitehttps://www.newcastlewa.gov/

Distance from Newcastle, WA to Nearby Cities

  • Renton, WA – 5 miles (8 km)
  • Bellevue, WA – 5 miles (8 km)
  • Mercer Island, WA – 7 miles (11 km)
  • Issaquah, WA – 10 miles (16 km)
  • Seattle, WA – 10 miles (16 km)
  • Redmond, WA – 12 miles (19 km)
  • Kirkland, WA – 15 miles (24 km)
  • SeaTac, WA – 15 miles (24 km)
  • Burien, WA – 15 miles (24 km)
  • Tukwila, WA – 10 miles (16 km)
  • Federal Way, WA – 25 miles (40 km)
  • Everett, WA – 35 miles (56 km)
  • Bothell, WA – 25 miles (40 km)
  • Woodinville, WA – 25 miles (40 km)
  • Tacoma, WA – 35 miles (56 km)
  • Puyallup, WA – 40 miles (64 km)
  • Olympia, WA – 60 miles (97 km)
  • Bellingham, WA – 110 miles (177 km)

Top Attractions in Newcastle, WA

  • Newcastle Beach Park – A waterfront park on Lake Washington with a beach, picnic areas, walking paths, and views across the lake.
  • Coal Creek Falls – A seasonal waterfall in the Cougar Mountain area accessible by hiking trails through forested terrain.
  • Cougar Mountain Regional Wildland Park – A large protected natural area with hiking trails, forests, wetlands, wildlife habitat, and historic mining features.
  • Newcastle Historic Coal Mine – Historic remnants and interpretive sites connected to the coal-mining industry that shaped the community.
  • Lake Boren Park – A community park with a lake, trails, sports facilities, picnic areas, and open recreational space.
  • May Creek Park – A natural area featuring wooded trails, wetlands, streams, and habitat for local wildlife.
  • Newcastle Golf Club – A nearby golf course known for wooded terrain and views toward Lake Washington and the Seattle skyline.
  • Lake Washington – A major regional lake offering boating, fishing, swimming, paddling, and scenic views of the Cascade Range and surrounding cities.

Airports Near Newcastle, WA

  • Seattle-Tacoma International Airport (SEA) – 15 miles
  • Renton Municipal Airport (RNT) – 8 miles
  • King County International Airport (BFI) – 15 miles
  • Kenmore Air Harbor (KEH) – 25 miles
  • Paine Field (PAE) – 40 miles

Sources:

Population and area data sourced from the United States Census Bureau (2020 Census). General city information referenced from the official Newcastle city website and local government records.

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