Newcastle, Washington
Newcastle: city in King County, Washington, United States
About
Newcastle is a city located in the county of King in the U.S. state of Washington. Its population at the 2010 census was 10,380. After 10 years in 2020 city had an estimated population of 12,905 inhabitants.
Quick Facts about Newcastle
| Population | 12,905 (2020) |
| Country | United States of America |
| State | Washington (United States) |
| County | King County |
| Postal code | 98059, 98056 |
| Phone Area Codes | 425 |
| Latitude & Longitude | 47.5390,-122.1557 |
| Altitude | 1,841 feet / 561, 171 meters |
| Time Zone | UTC−08:00, Pacific Time Zone |
| Local time | 13:05:58 (16th April 2026) |
| Population growth | 19.57% (2010-2020) |
| Weather | 36℉ Rain And Snow Showers Likely then Areas Of Frost 7-days weather |
Geography
Newcastle is located at 47°32'20"N 122°9'20"W (47.5389900, -122.1556800).
Newcastle map
icon to open full mode. View satellite images
Weather
Showers and thunderstorms before 8pm, then rain and snow showers likely between 8pm and 10pm, then a slight chance of rain and snow showers between 10...
7-Day ForecastOfficial website of Newcastle
Official WebsiteDemographics
The population of Newcastle increased by 19.57% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 10,380 | - | census |
| 2011 | 10,541 | 1.53% | estimation process |
| 2012 | 10,785 | 2.26% | estimation process |
| 2013 | 11,025 | 2.18% | estimation process |
| 2014 | 11,182 | 1.4% | estimation process |
| 2015 | 11,356 | 1.53% | estimation process |
| 2016 | 11,583 | 1.96% | estimation process |
| 2017 | 11,748 | 1.4% | estimation process |
| 2018 | 11,780 | 0.27% | estimation process |
| 2019 | 12,292 | 4.17% | estimation process |
| 2020 | 12,905 | 4.75% | estimation process |
People born in Newcastle (2)
People born in Newcastle, including politician Herman Carl Andersen, writer, illustrator John Martin Leahy, .
More notable people
Nearby Schools and Colleges
Schools and campuses linked to Newcastle, WA. Select a name to open its map and contact details.
| Code | Name | City | ZIP |
|---|---|---|---|
| 234669 | Bellevue College | Bellevue (WA) | 98007-6484 |
Nearby Transit Stations (17)
Rail and bus stations connected to Newcastle, WA. Select a station to open its map and address details.
| Code | Name | Address | Type |
|---|---|---|---|
| TUK | Tukwila station | 7301 South 158th St. | RAIL |
| SEA | King Street Station | 303 South Jackson Street | RAIL |
| SVF | Seattle (Ferry - Pier 69), Washington | 2701 Alaskan Way | OTHER |
| EDM | Edmonds station | 211 Railroad Ave. | RAIL |
| MEW | Monroe, Washington | 118 North Lewis St., Suite 112 | BUS |
Closest post offices linked to Newcastle.
| Post Office Name | City | ZIP |
|---|---|---|
| Midlak Post Office | Bellevue (WA) | 98006 |
Other cities in King County
Cities, towns, neighborhoods & other populated places in King County , WA. (more)
| City Name | Population | Title |
|---|---|---|
| Seattle | 769,714 | The eighteenth most populous city in the United States and the center of the Seattle metropolitan area. |
| Bellevue | 148,073 | The most populous city in Washington. |
| Kent | 130,676 | The fourth most populous city in King County, Washington. |
| Renton | 101,494 | The second most populous city in King County, Washington. |
| Federal Way | 96,307 | A city in King County, Washington. |
| Kirkland | 95,431 | A city in King County, Washington. |
| Auburn | 81,024 | The second most populous city in Pierce County, Washington. |
| Redmond | 72,507 | The second most populous city in King County, Washington. |
| Sammamish | 65,960 | Town |
| Shoreline | 58,197 | Town in Washington |
| Burien | 51,268 | Town in Washington, United States |
| Bothell | 47,524 | A city in King County, Washington. |
| Issaquah | 39,681 | A city in King County, Washington. |
| West Lake Sammamish | 33,929 | Census designated place |
| Des Moines | 32,389 | City in Washington |
| SeaTac | 28,904 | Airport in SeaTac, Washington, USA |
Distance to Other Cities
Newcastle distances to largest Washington cities