Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/WA/NEWCASTLE

Newcastle ZIP codes, Washington

No ZIP code is named for Newcastle, WA; addresses there use a neighbouring town's name. 3 ZIP codes cover it: 98059, 98006 and 98056.

USPS city name
0 ZIP codes
Overlapping the city
3 more
Population
12,989

Newcastle in numbers

About 12,989 people live in Newcastle, in 5,416 households. The median household income is $160,278 a year, 63% above the Washington median of $98,141 (US: $80,734). The median owner-occupied home is valued at $1,205,600 (2.1 times the Washington median), and median gross rent is $2,369 a month. The median age is 37.5; 68.5% of adults 25 and over hold a bachelor's degree or higher (39.6% across Washington); the average commute takes 28 minutes.

Population12,989Newcastle12,989
Households5,416Newcastle5,416
Median age37.5Newcastle37.5Washington38.3US 38.9
Median household income$160,278Newcastle$160,278Washington$98,141US $80,734
Median home value$1,205,600Newcastle$1,205,600Washington$564,600US $332,700
Median gross rent$2,369Newcastle$2,369Washington$1,760US $1,413
Bachelor's degree or higher68.5%Newcastle68.5%Washington39.6%US 35.7%
Mean commute27.9 minNewcastle27.9 minWashington26.6 minUS 26.4 min
Population density2,929 / sq miNewcastle2,929 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Newcastle city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes covering Newcastle

These ZIP codes cover part of Newcastle but are addressed as somewhere else.

ZIP codes overlapping Newcastle
ZIP City Type Population Median income Median home
98006 Bellevue , WA Standard 40,009 $198,150 $1,388,500
98056 Renton , WA Standard 35,849 $113,688 $797,300
98059 Renton , WA Standard 42,406 $138,654 $872,000

Map of Newcastle ZIP codes

980069805698059

The ZIP codes of Newcastle, WA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Newcastle

The nearest larger towns are Mercer Island (25,307 people, 3.8 mi), Renton (105,317 people, 3.9 mi) and Bryn Mawr-Skyway (17,638 people, 4.3 mi).

Towns near Newcastle
TownPopulationDistance
Mercer Island 25,307 3.8 mi
Renton 105,317 3.9 mi
Bryn Mawr-Skyway 17,638 4.3 mi
Bellevue 151,847 4.6 mi
East Renton Highlands 12,582 5.4 mi
Issaquah 39,591 5.5 mi
Fairwood 17,856 5.9 mi
Tukwila 21,451 6.4 mi
Boulevard Park 4,575 7.1 mi
Clyde Hill 3,119 7.3 mi
Sammamish 66,463 7.4 mi
Maple Heights-Lake Desire 4,113 7.4 mi
Medina 2,928 7.5 mi
White Center 14,886 8.7 mi

More nearby: every ZIP code in King County · Washington ZIP codes

Cite this page

zipcodes.pro. “Newcastle, WA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/wa/newcastle

Underlying data is public domain or openly licensed — sources, vintages and licences.