Assigned number format
Delaware assigns numbers in the pattern DL 1234 BD, using the DL prefix. Note that the vessel prefix (DL) is not the postal abbreviation (DE). Delaware regulations use DL, not DE, as the vessel prefix.
State Requirement Summary
Delaware Boat Registration Number Requirements
Boats registered in Delaware display a DL-prefixed number such as DL 1234 BD. Delaware uses the DL prefix rather than DE — that difference alone is a common ordering mistake. Delaware calls for characters 3 inches high in plain block characters, reading left to right, contrasting color, positioned forward half on both sides. Our lettering is designed to meet the displayed Delaware size and formatting requirements. The state itself issues the validation/expiration decal — we supply the registration-number lettering.
Boat number requirements
Last regulatory review: August 22, 2026
Assigned number example
DL 1234 BD
Delaware uses the DL prefix — not DE.
- Minimum character height
- 3 inches
- Lettering style
- Plain block characters
- Contrast
- Contrasting color
- Spacing / separator
- Space or hyphen between groups
- Reading direction
- Left to right
- Number location
- Forward half on both sides
- Validation decal
- Follow current DNREC-issued placement instructions
- State agency
- Delaware DNREC Division of Fish and Wildlife
What we sell vs. what the state issues: RegistrationDecals.com supplies the registration-number lettering, designed to meet the displayed Delaware size and formatting requirements. Delaware DNREC Division of Fish and Wildlife 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.
Design your DL numbers
Starts with the Delaware format (DL 1234 BD). Tap the decal and type your own assigned number exactly as it appears on your certificate of number.
Tap the decal to edit
Decal color
We supply the registration-number lettering, sized to the displayed Delaware requirements. Delaware DNREC Division of Fish and Wildlife issues the validation decal.
Delaware placement diagram
Both sides of the hull carry the number. The grey square marks where the state-issued validation decal goes — follow current dnrec-issued placement instructions.
- Height: 3 inches, plain block characters
- Spacing: Space or hyphen between groups
- Location: Forward half on both sides
- Validation decal: Follow current DNREC-issued placement instructions
Diagram is illustrative. Confirm exact positioning against the instructions issued with your Delaware registration.
Official source
Delaware DNREC Division of Fish and Wildlife — Primary state agency source. Last verified August 22, 2026 (source check 2026-08-22).
Delaware DNREC — Boat registrationRegistration 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.
Delaware rules in detail
Minimum character height
Delaware 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.
Required lettering style
Plain block characters, reading left to right. Script, italic and decorative treatments are not what this style describes.
Contrast requirement
Contrasting color. 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.
Spacing and separator
Space or hyphen between groups. Example: DL 1234 BD. Running the groups together with no separation does not match the stated format.
Placement on the hull
Forward half on both sides. Registration identification must remain visible.
Validation decal placement
Follow current DNREC-issued placement instructions. The validation or expiration decal is issued by Delaware DNREC Division of Fish and Wildlife — RegistrationDecals.com supplies the registration-number lettering only.
Common mistakes
- Ordering DE instead of the DL prefix Delaware actually assigns.
- Characters shorter than the stated minimum (3 inches) so they fit inside a narrow accent stripe.
- Using a script, italic or shadowed style instead of plain block characters.
- Losing the required separation between the groups — space or hyphen between groups.
- Placing the state validation decal somewhere other than the position Delaware describes: follow current DNREC-issued placement instructions.
Frequently asked questions
What does a Delaware boat registration number look like?
Delaware numbers follow the pattern DL 1234 BD, using the DL prefix, a numeral group, and suffix letters.
How tall do Delaware boat registration numbers have to be?
3 inches, measured on the character itself, in plain block characters.
What lettering style does Delaware require?
Plain block characters, reading left to right, and contrasting color.
How much space goes between the letters and numbers in Delaware?
Space or hyphen between groups. Example: DL 1234 BD.
Where do the numbers go on the boat in Delaware?
Forward half on both sides. Registration identification must remain visible.
Where does the Delaware validation decal go?
Follow current DNREC-issued placement instructions. The decal itself is issued by Delaware DNREC Division of Fish and Wildlife; we supply the registration-number lettering.
Who regulates boat registration numbers in Delaware?
Delaware DNREC Division of Fish and Wildlife. Confirm the current instructions issued with your registration before applying anything to your hull. Last regulatory review: August 22, 2026.
Can I order Delaware boat registration numbers online?
Yes. Enter your assigned DL 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.
Does Delaware use DE or DL on the decals?
DL. Delaware-registered vessels display the DL prefix — ordering DE produces the wrong number.
Related guides
Ready to design your DL numbers?
Our designer starts with plain block characters and proper group spacing, so you can see exactly how DL 1234 BD will read on your hull before you order.
Source: Delaware DNREC Division of Fish and Wildlife · 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.