# Vehicle registration plates of the United States for 1921

Vehicle registration plates of the United States by year :
| Vehicle registration plates of the United States for 1920 | Events of 1921 | Vehicle registration plates of the United States for 1922 |
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 1921.

## Passenger baseplates

Passenger  car  plates :
| Region | Design | Slogan | Serial format | Serials issued | Notes |
| Alabama | Embossed red lettering and rims on white base. "21" embossed vertically at left; "ALA" at right. | none | 12345 | | |
| Alaska | | | | | First year for territory plates. State plates begin in 1959. |
| American Samoa | | | | | Territory issued plates begin in 1924. |
| Arizona | | | | | |
| Arkansas | | | | | |
| California | Embossed black lettering and rims on yellow base. | none | | unknown | |
| Canal Zone | Embossed black on gray-green background | none | 1234 | | |
| Colorado | | | 123–456 | | |
| Connecticut | Embossed yellow numbers on black plate with border line; "CONN.–1921" embossed in yellow characters centered at bottom. | none | 12-345 123–456 | 1 to approximately 110-000 | |
| Delaware | | | | | |
| District of Columbia | | | | | |
| Florida | | | | | |
| Georgia | | | | | |
| Guam | | | | | |
| Hawaii | | | | | Territory issued plates begin in 1922. State issued plates begin in 1959. |
| Idaho | Embossed black numbers on white plate with border line; "IDAHO 54" embossed in black block letters centered at bottom. | none | A 12345 0/A 12345 | | Coded by county |
| Illinois | lettering and rims embossed on base; "ILL 21" embossed at right. | none | 123–456 | 1 to approximately ?? | |
| Indiana | Black lettering embossed on orange base. | none | 123456 | | County-coded |
| Iowa | Embossed silver lettering on black base; "IA 21" embossed at right. | none. Slogan introduced in 1953 as the state's unofficial nickname. | 123456 | 1 to an approximate 441000 | |
| Kansas | Embossed black numbers on orange plate with border line; "KAN 21" embossed in black block letters at right. | none | 123456 | | County-coded |
| Kentucky | Brown base with white embossed lettering and border. "KY. 1921" at right. | none | 123456 | | Issued in blocks by county |
| Louisiana | | | 12345 | | |
| Maine | Embossed white lettering and rims on red base. "MAINE 1921" embossed at bottom center. | none | 12-345 123–456 (both with square dash) | | |
| Maryland | Embossed red numbers and rims on white plate; "MD 21" embossed at bottom center. | none | 123–456 | | |
| Massachusetts | | | | | |
| Michigan | White embossed lettering on black base, stylized "MICH 21" at left. | none | 123–456 | | Issued in front and rear pairs. |
| Minnesota | Embossed black lettering and rims on turquoise plate; "MINN" embossed vertically at right. | A123456 | | "A" for weight class of vehicle. |
| Mississippi | White with embossed red lettering and rim. "1921" stamped vertically to left of registration number, "MISS" stamped vertically to right. | none | 12345 | unknown | |
| Missouri | Embossed XX lettering and rims on XX base. "MO 1921" embossed at bottom. | none | 12-345 | | |
| Montana | Embossed XX numbers on XX base. | none | | | |
| Nebraska | | none | | | |
| Nevada | | none | | | |
| New Hampshire | | none | | | County-coded |
| New Jersey | Embossed white lettering on green base; "N. J. 21" embossed at top. | none | 123456 | | |
| New Mexico | | none | | | |
| New York | Embossed white lettering and rims on navy blue base; "NY 1921" embossed at bottom center. | none | 123–456 | | |
| North Carolina | Embossed white letters on brown base. | none | 123456 | | |
| North Dakota | Embossed black serial on golden yellow plate with border line; vertical "ND" and "1922" at left and right respectively | none | 12-345 | 1 to approximately 99-000 | |
| Northern Mariana Islands | | | | | Territory issued plates begin in 1944. |
| Ohio | | | | | |
| Oklahoma | | none | | | |
| Oregon | Embossed white numbers on green plate. "ORE 1921" embossed at right. | none | 12345 | | |
| Pennsylvania | Embossed blue lettering on yellow base. "PENNA 1921" embossed at bottom with keystone logos on either side. | none | 1–234 | | |
| Puerto Rico | | | | | |
| Rhode Island | Embossed black serial on white plate with border line; "R.I. 1921" centered at bottom | none | 12345 | 1 to approximately 43000 | First embossed plate. |
| South Carolina | | none | | | |
| South Dakota | Embossed white lettering on green base. | none | 123456 | 30000 to approximately 154000 | Numbers below 30000 reserved for motorcycles and trucks. |
| Tennessee | | none | 12345 | | |
| Texas | | | 123–456 | | |
| Utah | Embossed yellow lettering and top and bottom border on black plate. "U 21" embossed at right. | none | 12345 | | |
| Vermont | Embossed dark green numbers on white plate; "54 VERMONT" embossed in dark green block letters centered at bottom. | none | 12345 A1234 | | |
| Virginia | Embossed dark blue lettering on orange plate. | none | 12345 | | |
| Washington | | none | | | |
| West Virginia | | none | 12345 | | |
| Wisconsin | Embossed black serial on light gray plate; vertical "WIS" over "21" at right | none | 123-456 | 1 to approximately 320-000 | |
| Wyoming | Embossed white numbers on black 1920 base plate; "1921 WYO" embossed in black-on-green metal insert at left. | none | 12345 | | |

## Non-passenger plates

Non-passenger  Plates :
| Region | Type | Design & Slogan | Serial format | Serials issued | Notes |
| Wisconsin | Dealer | Embossed black serial on light gray plate; vertical "WIS" over "21" at right; embossed solid star at left | 1234A | Dealer number and plate number | The number is the dealer number, the letter is the plate number for that dealer. |
| Wisconsin | Motorcycle | Embossed black serial on light gray plate; "W" over "21" at right; serial is slanted at a 45-degree angle | 1234 | 1 to approximately 6000 | |
| Wisconsin | Truck | Embossed black serial on light gray plate; vertical "TRUCK" at left, vertical "WIS" over "21" at right. | 12-345 | 1 to approximately 16-000 | |