Notes:
Some states require inspection / registration / emissions tests
Stickers are rarely blurred and often more reliable than plates
Inspection stickers can be different colors
New York registration and inspection are two separate stickers
Maine stickers look like a small chunk is missing on the edge

Geoguessr map

You can find the map to test your knowledge about the locations here.

Registration and Inspection
Louisiana Registration sticker

Louisiana
4-Square Registration sticker

 New Orleans, Louisiana Registration sticker

New Orleans, Louisiana
Circle Registration sticker

Maine Inspection sticker

Maine
Blue Inspection sticker

Maine Inspection sticker

Maine
Yellow Inspection sticker

Massachusetts Inspection sticker

Massachusetts
Green Inspection sticker

Massachusetts Inspection sticker

Massachusetts
Red Inspection sticker

New Hampshire Inspection sticker

New Hampshire
Green Inspection sticker

New Hampshire Registration sticker

New Hampshire
Red Registration sticker

New Jersey Inspection sticker

New Jersey
Red Inspection sticker

New Jersey Inspection sticker

New Jersey
Yellow Inspection sticker

New Jersey Inspection sticker

New Jersey
Blue Inspection sticker

New York Reg / Insp sticker

New York
Double Reg / Insp sticker

Pennsylvania Emissions sticker

Pennsylvania
Double Emissions sticker

Texas Registration sticker

Texas
Blue Registration sticker

Vermont Inspection sticker

Vermont
Red Inspection sticker

Vermont Inspection sticker

Vermont
Green Inspection sticker

Virginia Safety sticker

Virginia
Yellow Safety sticker

Virginia Safety sticker

Virginia
Red Safety sticker

DC Registration sticker

Washington, DC
Holographic DC sticker

West Virginia Inspection sticker

West Virginia
Blue Inspection sticker