State Requirement Summary

Mississippi Boat Registration Number Requirements

Boats registered in Mississippi display an MI-prefixed number such as MI 1234 AB. Mississippi uses the MI prefix rather than MS — that difference alone is a common ordering mistake. Mississippi calls for characters 3 inches high in block characters of good proportion, reading left to right, must contrast with background, positioned each side of the bow / forward half. Our lettering is designed to meet the displayed Mississippi 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

MI 1234 AB

Mississippi uses the MI prefix — not MS.

Minimum character height: 3 inches
Lettering style: Block characters of good proportion
Contrast: Must contrast with background
Spacing / separator: Hyphens or equivalent spaces
Reading direction: Left to right
Number location: Each side of the bow / forward half
Validation decal: Within 6 inches of the registration numbers
State agency: Mississippi Department of Wildlife, Fisheries and Parks

What we sell vs. what the state issues: RegistrationDecals.com supplies the registration-number lettering, designed to meet the displayed Mississippi size and formatting requirements. Mississippi Department of Wildlife, Fisheries and Parks 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 MI numbers

Starts with the Mississippi format (MI 1234 AB). 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 Mississippi requirements. Mississippi Department of Wildlife, Fisheries and Parks issues the validation decal.

Mississippi placement diagram

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 numbers.

Port side — bow to the left

Starboard side — bow to the right

Height: 3 inches, block characters of good proportion
Spacing: Hyphens or equivalent spaces
Location: Each side of the bow / forward half
Validation decal: Within 6 inches of the registration numbers

Diagram is illustrative. Confirm exact positioning against the instructions issued with your Mississippi registration.

Official source

Mississippi Department of Wildlife, Fisheries and Parks — Primary state agency source. Last verified August 22, 2026 (source check 2026-08-22).

Mississippi Department of Wildlife, Fisheries and Parks — Boating

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.

Mississippi rules in detail

Assigned number format

Mississippi assigns numbers in the pattern MI 1234 AB, using the MI prefix. Note that the vessel prefix (MI) is not the postal abbreviation (MS). The Mississippi vessel prefix is MI, not MS.

Minimum character height

Mississippi 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

Block characters of good proportion, reading left to right. Script, italic and decorative treatments are not what this style describes.

Contrast requirement

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.

Spacing and separator

Hyphens or equivalent spaces. Example: MI 1234 AB. Running the groups together with no separation does not match the stated format.

Placement on the hull

Each side of the bow / forward half. No other numbers on the bow.

Validation decal placement

Within 6 inches of the registration numbers. The validation or expiration decal is issued by Mississippi Department of Wildlife, Fisheries and Parks — RegistrationDecals.com supplies the registration-number lettering only.

Common mistakes

Ordering MS instead of the MI prefix Mississippi 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 block characters of good proportion.
Losing the required separation between the groups — hyphens or equivalent spaces.
Placing the state validation decal somewhere other than the position Mississippi describes: within 6 inches of the registration numbers.

Frequently asked questions

What does a Mississippi boat registration number look like?

Mississippi numbers follow the pattern MI 1234 AB, using the MI prefix, a numeral group, and suffix letters.

How tall do Mississippi boat registration numbers have to be?

3 inches, measured on the character itself, in block characters of good proportion.

What lettering style does Mississippi require?

Block characters of good proportion, reading left to right, and must contrast with background.

How much space goes between the letters and numbers in Mississippi?

Hyphens or equivalent spaces. Example: MI 1234 AB.

Where do the numbers go on the boat in Mississippi?

Each side of the bow / forward half. No other numbers on the bow.

Where does the Mississippi validation decal go?

Within 6 inches of the registration numbers. The decal itself is issued by Mississippi Department of Wildlife, Fisheries and Parks; we supply the registration-number lettering.

Who regulates boat registration numbers in Mississippi?

Mississippi Department of Wildlife, Fisheries and Parks. Confirm the current instructions issued with your registration before applying anything to your hull. Last regulatory review: August 22, 2026.

Can I order Mississippi boat registration numbers online?

Yes. Enter your assigned MI 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 Mississippi use MS or MI on the decals?

MI. Mississippi-registered vessels display the MI prefix — ordering MS produces the wrong number.

Related guides

Ready to design your MI numbers?

Our designer starts with plain block characters and proper group spacing, so you can see exactly how MI 1234 AB will read on your hull before you order.

Source: Mississippi Department of Wildlife, Fisheries and Parks · Primary state agency source · Primary agency material · Source last checked 2026-08-22.