NEWCASTLE, WA ZIP Code
| City | NEWCASTLE |
| State | Washington |
| ZIP Codes count | 2 (see all) |
| Post offices count | 1 (see all) |
| Total population | 11,559 (see all) |
ZIP Codes in NEWCASTLE, Washington
98056, 98059
This list contains only 5-digit ZIP codes. Use our zip code lookup by address feature to get the full 9-digit (ZIP+4) code.
List of NEWCASTLE, WA ZIP Codes
| ZIP | TYPE | POPU |
|---|---|---|
| 98056 | STANDARD | 36,950 |
| 98059 | STANDARD | 41,076 |
Post offices
HIGHLANDS — Post Office™ 4301 NE 4TH ST RENTON, WA 98059-9998 |
Envelope example
On the bottom center of the envelope, write the address you want your letter delivered to. Include the following on separate lines:
- Recipient's full name
- Full street address
- City, State, and ZIP Code
Using the same format, write the return address in the top left corner.
Using the full ZIP+4 Code when mailing via the USPS ensures the fastest, most accurate mailing possible. If you are not sure of the full 9-digit ZIP Code, use the 5-digit ZIP Code to avoid loss of letter or package.

The recipient address information is provided for your reference.
Address example
6921 113TH PL SE
NEWCASTLE WA 98056-1093
NEWCASTLE WA 98056-1093
7943 120TH AVE SE
NEWCASTLE WA 98056-9179
NEWCASTLE WA 98056-9179
8496 126TH PL SE
NEWCASTLE WA 98056-9136
NEWCASTLE WA 98056-9136
6687 135TH CT SE
NEWCASTLE WA 98059-5350
NEWCASTLE WA 98059-5350
12595 SE 78TH CT
NEWCASTLE WA 98056-9165
NEWCASTLE WA 98056-9165
11459 SE 87TH ST
NEWCASTLE WA 98056-1614
NEWCASTLE WA 98056-1614
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Census data for NEWCASTLE, WA
Demographic and housing estimates in NEWCASTLE, WA
| Total population | 11,559 |
| Male | 5,686 |
| Female | 5,873 |
| Total population | 11,559 |
| Under 5 years | 713 |
| 5 to 9 years | 677 |
| 10 to 14 years | 756 |
| 15 to 19 years | 489 |
| 20 to 24 years | 773 |
| 25 to 34 years | 1,593 |
| 35 to 44 years | 2,016 |
| 45 to 54 years | 1,885 |
| 55 to 59 years | 793 |
| 60 to 64 years | 461 |
| 65 to 74 years | 755 |
| 75 to 84 years | 399 |
| 85 years and over | 249 |
| Median age (years) | 38.7 |
| Under 18 years | 2,543 |
| 16 years and over | 9,283 |
| 18 years and over | 9,016 |
| 21 years and over | 8,782 |
| 62 years and over | 1,729 |
| 65 years and over | 1,403 |
| Total population | 11,559 |
| One race | 11,013 |
| White | 6,835 |
| Black or African American | 317 |
| American Indian and Alaska Native | 11 |
| Asian | 3,737 |
| Native Hawaiian and Other Pacific Islander | 0 |
| Some other race | 113 |
| Two or more races | 546 |
| Citizen, VOTING AGE 18 and over population | 7,833 |
| Male Citizen, VOTING AGE 18 and over population | 3,941 |
| Female Citizen, VOTING AGE 18 and over population | 3,892 |
Social characteristics in NEWCASTLE, WA
| Total households | 4,396 |
| Family households (families) | 3,293 |
| Married-couple family | 2,725 |
| Male householder, no wife present, family | 209 |
| Female householder, no husband present, family | 359 |
| Nonfamily households | 1,103 |
| Average household size | 2.62 |
| Average family size | 2.92 |
Economic characteristics in NEWCASTLE, WA
| Total households | 4,396 |
| Less than $10,000 | 102 |
| $10,000 to $14,999 | 24 |
| $15,000 to $24,999 | 87 |
| $25,000 to $34,999 | 193 |
| $35,000 to $49,999 | 305 |
| $50,000 to $74,999 | 557 |
| $75,000 to $99,999 | 610 |
| $100,000 to $149,999 | 744 |
| $150,000 to $199,999 | 519 |
| $200,000 or more | 1,255 |
| Median household income (dollars) | 119,125 |
Housing characteristics in NEWCASTLE, WA
| Total housing units | 4,543 |
| Occupied housing units | 4,396 |
| Vacant housing units | 147 |
| Total housing units | 4,543 |
| 1-unit, detached | 3,223 |
| 1-unit, attached | 174 |
| 2 units | 8 |
| 3 or 4 units | 57 |
| 5 to 9 units | 162 |
| 10 to 19 units | 252 |
| 20 or more units | 633 |
| Mobile home | 24 |
| Boat, RV, van, etc. | 10 |
| Total housing units | 4,543 |
| Built 2014 or later | 151 |
| Built 2010 to 2013 | 225 |
| Built 2000 to 2009 | 1,014 |
| Built 1990 to 1999 | 1,125 |
| Built 1980 to 1989 | 1,043 |
| Built 1970 to 1979 | 359 |
| Built 1960 to 1969 | 464 |
| Built 1950 to 1959 | 107 |
| Built 1940 to 1949 | 18 |
| Built 1939 or earlier | 37 |
| Total housing units | 4,543 |
| 1 room | 92 |
| 2 rooms | 171 |
| 3 rooms | 409 |
| 4 rooms | 358 |
| 5 rooms | 395 |
| 6 rooms | 420 |
| 7 rooms | 441 |
| 8 rooms | 832 |
| 9 rooms or more | 1,425 |
| Median rooms | 7.5 |
| Total housing units | 4,543 |
| No bedroom | 108 |
| 1 bedroom | 474 |
| 2 bedrooms | 661 |
| 3 bedrooms | 1,134 |
| 4 bedrooms | 1,483 |
| 5 or more bedrooms | 683 |
| Occupied housing units | 4,396 |
| Owner-occupied | 3,341 |
| Renter-occupied | 1,055 |
| Average household size of owner-occupied unit | 2.70 |
| Average household size of renter-occupied unit | 2.35 |
| Occupied housing units | 4,396 |
| Moved in 2017 or later | 255 |
| Moved in 2015 to 2016 | 560 |
| Moved in 2010 to 2014 | 1,308 |
| Moved in 2000 to 2009 | 1,326 |
| Moved in 1990 to 1999 | 553 |
| Moved in 1989 and earlier | 394 |
| Owner-occupied units | 3,341 |
| Less than $50,000 | 38 |
| $50,000 to $99,999 | 0 |
| $100,000 to $149,999 | 32 |
| $150,000 to $199,999 | 27 |
| $200,000 to $299,999 | 118 |
| $300,000 to $499,999 | 553 |
| $500,000 to $999,999 | 2,073 |
| $1,000,000 or more | 500 |
| Median (dollars) | 691,400 |
| Owner-occupied units | 3,341 |
| Housing units with a mortgage | 2,565 |
| Housing units without a mortgage | 776 |
| Occupied units paying rent | 997 |
| Less than $500 | 0 |
| $500 to $999 | 48 |
| $1,000 to $1,499 | 187 |
| $1,500 to $1,999 | 546 |
| $2,000 to $2,499 | 181 |
| $2,500 to $2,999 | 9 |
| $3,000 or more | 26 |
| Median (dollars) | 1,741 |
| No rent paid | 58 |
Data is based on 2018 Census
ZIP Codes for other locations
State for NEWCASTLE
Washington ZIP CodesOther cities in Washington