# Vehicle registration plates of the United States for 1931

Vehicle registration plates of the United States by year :
| Vehicle registration plates of the United States for 1930 | Events of 1931 | Vehicle registration plates of the United States for 1932 |
Each of the 48 states of the United States of America plus several of its territories and the District of Columbia issued individual passenger license plates for 1931.

## Passenger baseplates

Passenger  Car  Plates :
| Region | Design | Slogan | Serial format | Serials issued | Notes |
| Alabama | | | | | |
| Alaska | | | | | |
| American Samoa | | | | | |
| Arizona | | | | | |
| Arkansas | | | | | |
| California | | | | | |
| Canal Zone | | | | | |
| Colorado | | | | | |
| Connecticut | | | | | |
| Delaware | | | | | |
| District of Columbia | | | | | |
| Florida | | | | | |
| Georgia | | | | | |
| Guam | | | | | |
| Hawai'i | | | | | |
| Idaho | | | | | |
| Illinois | | | | | |
| Indiana | | | | | |
| Iowa | | | | | |
| Kansas | | | | | |
| Kentucky | | | | | Plates with an initial star (*) are truck plates. |
| Louisiana | | | | | |
| Maine | | | | | |
| Maryland | | | | | |
| Massachusetts | | | | | |
| Michigan | | | | | |
| Minnesota | | | | | |
| Mississippi | Embossed white lettering and border on orange base; "MISS 1931" centered at bottom | none | 1-234 12-345 123-456 | 1 to approximately 245-000 | |
| Missouri | | | | | |
| Montana | | | | | |
| Nebraska | Red on gray; "1931 NEB" at right | none | 1-12345 10-1234 | Coded by county of issuance (1 or 10) | |
| Nevada | | | | | |
| New Hampshire | | | | | |
| New Jersey | | | | | |
| New Mexico | | | | | |
| New York | | | | | |
| North Carolina | | | | | |
| North Dakota | | | | | |
| Northern Mariana Islands | | | | | |
| Ohio | | | | | |
| Oklahoma | | | | | |
| Oregon | | | | | |
| Pennsylvania | | | | | |
| Puerto Rico | | | | | |
| Rhode Island | | | | | |
| South Carolina | | | | | |
| South Dakota | | | | | |
| Tennessee | | | | | |
| Texas | | | | | |
| Utah | | | | | |
| Vermont | | | | | |
| Virginia | | | | | |
| Washington | | | | | |
| West Virginia | | | | | |
| Wisconsin | Embossed yellow serial on dark blue plate; vertical "WIS" at left, weight class over "31" at right | none | 123-456A | Coded by weight class | Weight classes are A, B, C, D, and E. Weight classes were dropped after 1931. |
| Wyoming | | | | | |

## Non-passenger plates

Non-passenger  Plates :
| Region | Type | Design & Slogan | Serial format | Serials issued | Notes |
| Wisconsin | City bus | Embossed yellow serial on dark blue plate; unknown format | | Coded by weight class | |
| Wisconsin | Dealer | Embossed yellow serial on dark blue plate; vertical "WIS" at right; embossed solid star over "31" at left | 1234A | Dealer number and plate number | The number is the dealer number, the letter is the plate number for that dealer |
| Wisconsin | Interurban Bus | Embossed yellow serial on dark blue plate; unknown format | | Coded by weight class | |
| Wisconsin | Motorcycle | Embossed yellow serial on dark blue plate; unknown format | A1234 | A 1 to approximately A1000 | Used on regular motorcycles |
| Wisconsin | Motorcycle | Embossed yellow serial on dark blue plate; unknown format | B123 | B 1 to approximately B500 | Used on motorcycles with sidecars |
| Wisconsin | Municipal | Embossed blue serial on yellow plate; vertical "WIS" at left, vertical "1931" at left | 1234 | 1 to approximately 5200 | Motorcycle version also available |
| Wisconsin | Trailer | Embossed red serial on cream plate; "30" over "31" at left, vertical "TRALR" between date and serial; vertical "WIS" at right | A 12 | Coded by weight class | Weight classes same as truck |
| Wisconsin | Truck | Embossed red serial on cream plate; vertical "WIS" at right "30" over "31" at left | A12345 | Coded by weight class | Weight classes were A, B, C, D, E, and F |