Assigned number format
Kentucky assigns numbers in the pattern KY 1234 AA, using the KY prefix. Remove old registration decals when renewing.
State Requirement Summary
Kentucky Boat Registration Number Requirements
Boats registered in Kentucky display a KY-prefixed number such as KY 1234 AA. Kentucky calls for characters 3 inches high in plain block design, reading left to right, maximum contrast to the hull / background, positioned bow / forward half of each side. Our lettering is designed to meet the displayed Kentucky 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
KY 1234 AA
- Minimum character height
- 3 inches
- Lettering style
- Plain block design
- Contrast
- Maximum contrast to the hull / background
- Spacing / separator
- Letter-size space between groups
- Reading direction
- Left to right
- Number location
- Bow / forward half of each side
- Validation decal
- Within 6 inches BEHIND / AFT of the registration number and in line with it
- State agency
- Kentucky Department of Fish and Wildlife Resources
What we sell vs. what the state issues: RegistrationDecals.com supplies the registration-number lettering, designed to meet the displayed Kentucky size and formatting requirements. Kentucky Department of Fish and Wildlife Resources 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 KY numbers
Starts with the Kentucky format (KY 1234 AA). 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 Kentucky requirements. Kentucky Department of Fish and Wildlife Resources issues the validation decal.
Kentucky placement diagram
Both sides of the hull carry the number. The grey square marks where the state-issued validation decal goes — within 6 inches behind / aft of the registration number and in line with it.
- Height: 3 inches, plain block design
- Spacing: Letter-size space between groups
- Location: Bow / forward half of each side
- Validation decal: Within 6 inches BEHIND / AFT of the registration number and in line with it
Diagram is illustrative. Confirm exact positioning against the instructions issued with your Kentucky registration.
Official source
Kentucky Department of Fish and Wildlife Resources — Primary state agency source. Last verified August 22, 2026 (source check 2026-08-22).
Kentucky Department of Fish and Wildlife Resources — BoatingRegistration 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.
Kentucky rules in detail
Minimum character height
Kentucky 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 design, reading left to right. Script, italic and decorative treatments are not what this style describes.
Contrast requirement
Maximum contrast to the hull / 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.
Spacing and separator
Letter-size space between groups. Example: KY 1234 AA. Running the groups together with no separation does not match the stated format.
Placement on the hull
Bow / forward half of each side. Assigned number only.
Validation decal placement
Within 6 inches BEHIND / AFT of the registration number and in line with it. The validation or expiration decal is issued by Kentucky Department of Fish and Wildlife Resources — RegistrationDecals.com supplies the registration-number lettering only.
Common mistakes
- Ordering the number without the KY prefix or the suffix letters.
- 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 design.
- Losing the required separation between the groups — letter-size space between groups.
- Placing the state validation decal somewhere other than the position Kentucky describes: within 6 inches BEHIND / AFT of the registration number and in line with it.
Frequently asked questions
What does a Kentucky boat registration number look like?
Kentucky numbers follow the pattern KY 1234 AA, using the KY prefix, a numeral group, and suffix letters.
How tall do Kentucky boat registration numbers have to be?
3 inches, measured on the character itself, in plain block design.
What lettering style does Kentucky require?
Plain block design, reading left to right, and maximum contrast to the hull / background.
How much space goes between the letters and numbers in Kentucky?
Letter-size space between groups. Example: KY 1234 AA.
Where do the numbers go on the boat in Kentucky?
Bow / forward half of each side. Assigned number only.
Where does the Kentucky validation decal go?
Within 6 inches BEHIND / AFT of the registration number and in line with it. The decal itself is issued by Kentucky Department of Fish and Wildlife Resources; we supply the registration-number lettering.
Who regulates boat registration numbers in Kentucky?
Kentucky Department of Fish and Wildlife Resources. Confirm the current instructions issued with your registration before applying anything to your hull. Last regulatory review: August 22, 2026.
Can I order Kentucky boat registration numbers online?
Yes. Enter your assigned KY 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.
Do I need two sets of Kentucky registration numbers?
You need the number displayed on both sides of the vessel — bow / forward half of each side — so every order ships as a matched port-and-starboard pair.
Related guides
Ready to design your KY numbers?
Our designer starts with plain block characters and proper group spacing, so you can see exactly how KY 1234 AA will read on your hull before you order.
Source: Kentucky Department of Fish and Wildlife Resources · 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.