The Ultimate Guide to Boat Registration Number Regulations: (2025-2026)
Applying registration numbers to your boat isn't just about aesthetics it’s a federal and state requirement. While the U.S. Coast Guard sets the baseline, individual states often have unique "quirks" regarding spacing, decal placement, and even font style.
At Domed Numbers, we’ve spent over 20 years ensuring that every set of numbers we produce meets these rigorous standards while matching your boat's factory finish.
The "Universal" Rules of Boat Lettering
Across almost every jurisdiction, the following USCG standards apply:
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Height: Characters must be at least 3 inches tall.
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Contrast: Characters must sharply contrast with your hull color (e.g., white letters on a dark hull).
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Placement: Numbers must be permanently attached to both sides of the forward half (bow) of the vessel, reading from left to right.
50-State Regulation Breakdown
Below is the specific regulatory data for every state. Note: Unless otherwise specified, the state follows the "Universal" 3-inch rule.
| State |
State Plate Placement |
State-Specific Requirements |
| Alabama (AL) | Within 6 inches of registration number. |
Numbers remain with the boat for its lifetime.
|
| Alaska (AK) | Within 6 inches. | Required for all motorized boats over 10 HP. |
| Arizona (AZ) | 3 inches in front of the prefix. | Must be clearly visible from 100 feet. |
| Arkansas (AR) | Adjacent to numbers. | Bold, block letters required; renew every 3 years. |
| California (CA) |
3 inches behind number. |
Must be plain, vertical block font. |
| Colorado (CO) | Above the waterline. | No registration for non-motorized vessels. |
| Connecticut (CT) | On each side of the bow. | Valid for 1 year; requires annual renewal. |
| Delaware (DE) | In line with numbers. | Characters must be at least 3 inches tall. |
| Florida (FL) | Within 6 inches. |
Permanent numbers that stay with the hull.
|
| Georgia (GA) | Within 6 inches. | Applies to all mechanically propelled vessels. |
| Hawaii (HI) | Above the waterline. | Kayaks and canoes are exempt from registration. |
| Idaho (ID) | Adjacent to numbers. | Annual renewal required for motorized vessels. |
| Illinois (IL) | On both sides of the bow. | Boats over 16 feet must be registered. |
| Indiana (IN) | In line with numbers. | Solid colors only; no shadows or italics allowed. |
| Iowa (IA) | In line with numbers. | Must be readable from 100 feet away. |
| Kansas (KS) | 3 inches aft (behind). | Applies to all powered vessels and sailboats. |
| Kentucky (KY) | Within 6 inches. | Renewal required every 3 years. |
| Louisiana (LA) | Within 6 inches. | Hyphen or space must equal the width of a character. |
| Maine (ME) | In line with numbers. | Stickers must be waterproof and fade-resistant. |
| Maryland (MD) | Within 3 inches | Shorter decal distance than most other states. |
| Massachusetts (MA) | Within 6 inches. | Must renew registration every 2 years. |
| Michigan (MI) | In line with numbers. | Must be visible from 100 feet during daylight. |
| Minnesota (MN) | Within 6 inches. | All boats over 10 feet must be registered. |
| Mississippi (MS) | Within 6 inches preceding prefix. | Decal goes before the numbers on both sides. |
| Missouri (MO) | In line with numbers. | Applies to all motorized boats; 3-year registration. |
| Montana (MT) | 3 inches aft (behind). | Port decal 3" aft; Starboard decal immediately aft. |
| Nebraska (NE) | In line with numbers. | High visibility is legally mandated. |
| **Nevada (NV) ** | Within 6 inches. | Renewal required every 3 years. |
| New Hampshire (NH) | In line with numbers. | Applies to all powered boats; waterproof decals required. |
| New Jersey (NJ) | On the forward half. | Registration valid for 3 years. |
| New Mexico (NM) | 6" past aft | Port side decal placement is strictly 6" aft. |
| New York (NY) | In line with numbers. | Canoes and kayaks are exempt; annual renewal. |
| North Carolina (NC) | In line with numbers. | Must use block-style font only. |
| North Dakota (ND) | Within 6 inches. | Applies to all motorized vessels. |
| Ohio (OH) | In line with numbers. | Must be plain block lettering; 3-year validity. |
| Oklahoma (OK) | Behind (aft) and in line. | Stroke width must be at least 0.5 inches. |
| Oregon (OR) | 3 inches toward stern. | Gap Rule: Must have at least 2 inches between groups. |
| Pennsylvania (PA) | Within 6 inches. | May precede or follow numbers. |
| Rhode Island (RI) | To the right and in line. | Bold block letters; visible from 100 feet. |
| South Carolina (SC) | Within 6 inches following. | Must be clear, legible block characters. |
| South Dakota (SD) | Adjacent and in line. | Visible at 100 ft on a clear day. |
| Tennessee (TN) | Left or right of number. | Plain, vertical block letters mandatory. |
| Texas (TX) |
3 inches toward rear. |
Space or hyphen required between prefix/numerals. |
| Utah (UT) | 3 inches aft (rear). | Must be legible from 150 feet. |
| Vermont (VT) | Within 6 inches. | Port decal precedes number; Starboard follows it. |
| Virginia (VA) | Within 6 inches. | Space or hyphen required to separate segments. |
| Washington (WA) | Within 6 inches aft. | Must be aft (rear) and directly in line. |
| West Virginia (WV) | Within 6 inches following. | Decal must immediately follow assigned number. |
| Wisconsin (WI) | 3 inches aft (rear). | In line with numbers; WS prefix required. |
| Wyoming (WY) | Aft (rear) and in line. | Space between segments must equal the width of "W". |
Why Domed Numbers is the Pro Choice for Compliance
While many local sign shops can "cut vinyl," they often lack the specialized knowledge of marine regulations. At Domed Numbers, we provide:
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Guided Compliance: Our online designer is built to help you meet the 3-inch height and block style rules automatically.
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Factory Matching: We offer exact font matches for over 165 boat manufacturers, ensuring your legal numbers look like part of the original design.
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Marine-Grade Durability: Our 3D domed letters use non-yellowing polyurethane resin that resists saltwater and UV damage for up to 7 years.
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"Oops-Proof" Installation: Every order arrives pre-spaced and lined on a transfer sheet, making DIY application easy and straight.
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