State Requirement Summary
Boats registered in Washington display a WN-prefixed number such as WN 1234 ZZ. Washington uses the WN prefix rather than WA — that difference alone is a common ordering mistake. Washington calls for characters 3 inches high in BLOCK style, reading left to right, must contrast with background, positioned both sides of the bow. Our lettering is designed to meet the displayed Washington size and formatting requirements. The state itself issues the validation/expiration decal — we supply the registration-number lettering.
Last regulatory review: August 22, 2026
Assigned number example
WN 1234 ZZ
Washington uses the WN prefix — not WA.
What we sell vs. what the state issues: RegistrationDecals.com supplies the registration-number lettering, designed to meet the displayed Washington size and formatting requirements. Washington State Department of Licensing issues the official validation/expiration decal — and any separate stickers such as aquatic-invasive-species, mussel-awareness, carbon-monoxide or lake-protection stickers, which are not interchangeable with each other.
Starts with the Washington format (WN 1234 ZZ). Tap the decal and type your own assigned number exactly as it appears on your certificate of number.
Tap the decal to edit
We supply the registration-number lettering, sized to the displayed Washington requirements. Washington State Department of Licensing issues the validation decal.
Both sides of the hull carry the number. The grey square marks where the state-issued validation decal goes — within 6 inches of the registration number, aft and directly in line.
Diagram is illustrative. Confirm exact positioning against the instructions issued with your Washington registration.
Washington State Department of Licensing — Primary state agency source. Last verified August 22, 2026 (source check 2026-08-22).
Washington State Department of Licensing — Register a boatRegistration requirements can change. RegistrationDecals.com summarizes publicly available boating-registration requirements to help boat owners select and display registration numbers. Always compare your registration and decals with the current instructions issued by your state boating or registration agency before applying them to your vessel.
Washington assigns numbers in the pattern WN 1234 ZZ, using the WN prefix. Note that the vessel prefix (WN) is not the postal abbreviation (WA). The Washington boat prefix is WN, not WA. Federally documented vessels must not display a WN number.
Washington specifies characters 3 inches high. Measure the character body itself — if the state excludes borders, outlines or shading, decorative trim does not count toward the minimum.
BLOCK style, reading left to right. Script, italic and decorative treatments are not what this style describes.
Must contrast with background. In practice that means dark characters on a light hull and light characters on a dark hull, checked in daylight from the side of the vessel.
Hyphen or equivalent space between the three segments. Example: WN 1234 ZZ. Running the groups together with no separation does not match the stated format.
Both sides of the bow. Must remain distinctly visible.
Within 6 inches of the registration number, AFT and directly in line. The validation or expiration decal is issued by Washington State Department of Licensing — RegistrationDecals.com supplies the registration-number lettering only.
Washington numbers follow the pattern WN 1234 ZZ, using the WN prefix, a numeral group, and suffix letters.
3 inches, measured on the character itself, in BLOCK style.
BLOCK style, reading left to right, and must contrast with background.
Hyphen or equivalent space between the three segments. Example: WN 1234 ZZ.
Both sides of the bow. Must remain distinctly visible.
Within 6 inches of the registration number, AFT and directly in line. The decal itself is issued by Washington State Department of Licensing; we supply the registration-number lettering.
Washington State Department of Licensing. Confirm the current instructions issued with your registration before applying anything to your hull. Last regulatory review: August 22, 2026.
Yes. Enter your assigned WN number in the designer on this page, pick a color that contrasts with your hull, and we cut a matched port-and-starboard pair and ship it to the 48 contiguous states.
WN. Washington-registered vessels display the WN prefix — ordering WA produces the wrong number.
Our designer starts with plain block characters and proper group spacing, so you can see exactly how WN 1234 ZZ will read on your hull before you order.
Source: Washington State Department of Licensing · Primary state agency source · Primary · Source last checked 2026-08-22.
Registration requirements can change. RegistrationDecals.com summarizes publicly available boating-registration requirements to help boat owners select and display registration numbers. Always compare your registration and decals with the current instructions issued by your state boating or registration agency before applying them to your vessel.
