- Fairchild Air Force Base - Zip Codes in Fairchild Air Force Base
- Fall City - Zip Codes in Fall City
- Federal Way - Zip Codes in Federal Way
- Ferndale - Zip Codes in Ferndale
- Forks - Zip Codes in Forks
- Friday Harbor - Zip Codes in Friday Harbor
- George - Zip Codes in George
- Gig Harbor - Zip Codes in Gig Harbor
- Gold Bar - Zip Codes in Gold Bar
- Goldendale - Zip Codes in Goldendale
- Graham - Zip Codes in Graham
- Grandview - Zip Codes in Grandview
- Granger - Zip Codes in Granger
- Granite Falls - Zip Codes in Granite Falls
- Greenacres - Zip Codes in Greenacres
- Hoquiam - Zip Codes in Hoquiam
- Issaquah - Zip Codes in Issaquah
- Kalama - Zip Codes in Kalama
- Kelso - Zip Codes in Kelso
- Kenmore - Zip Codes in Kenmore
- Kennewick - Zip Codes in Kennewick
- Kent - Zip Codes in Kent
- Kettle Falls - Zip Codes in Kettle Falls
- Kingston - Zip Codes in Kingston
- Kirkland - Zip Codes in Kirkland
- La Center - Zip Codes in La Center
- Lacey - Zip Codes in Lacey
- Lakebay - Zip Codes in Lakebay
- Lake Stevens - Zip Codes in Lake Stevens
- Lakewood - Zip Codes in Lakewood
- Langley - Zip Codes in Langley
- Leavenworth - Zip Codes in Leavenworth
- Liberty Lake - Zip Codes in Liberty Lake
- Longview - Zip Codes in Longview
- Lynden - Zip Codes in Lynden
- Lynnwood - Zip Codes in Lynnwood
- Maple Valley - Zip Codes in Maple Valley
- Marysville - Zip Codes in Marysville
- Mattawa - Zip Codes in Mattawa
- Mcchord Afb - Zip Codes in Mcchord Afb
- Mead - Zip Codes in Mead
- Medical Lake - Zip Codes in Medical Lake
- Mercer Island - Zip Codes in Mercer Island
- Mill Creek - Zip Codes in Mill Creek
- Milton - Zip Codes in Milton
- Monroe - Zip Codes in Monroe
- Montesano - Zip Codes in Montesano
- Moses Lake - Zip Codes in Moses Lake
- Mountlake Terrace - Zip Codes in Mountlake Terrace
- Mount Vernon - Zip Codes in Mount Vernon
- Mukilteo - Zip Codes in Mukilteo