Image from Flickr
Different states have different motorcycle helmet laws. We came up with a comprehensive list that will show you the helmet requirements broken down by state. The following is a list of who is required to wear a helmet when riding a motorcycle, based on universal state laws.
Alabama all riders
Alaska age 17 and younger
Arizona age 17 and younger
Arkansas age 20 and younger
California all riders
Colorado age 17 and younger riders and passengers
Connecticut age 17 and younger
Delaware age 18 and younger
District of Columbia all riders
Florida age 20 and younger
Georgia all riders
Hawaii age 17 and younger
Idaho age 17 and younger
Illinois no helmet laws
Indiana age 17 and younger
Iowa no helmet laws
Kansas age 17 and younger
Kentucky age 20 and younger
Louisiana all riders
Maine age 17 and younger
Maryland all riders
Massachusetts all riders
Michigan age 20 and younger
Minnesota age 17 and younger
Mississippi all riders
Missouri all riders
Montana age 17 and younger
Nebraska all riders
Nevada all riders
New Hampshire no law
New Jersey all riders
New Mexico age 17 and younger
New York all riders
North Carolina all riders
North Dakota age 17 and younger
Ohio age 17 and younger
Oklahoma age 17 and younger
Oregon all riders
Pennsylvania age 20 and younger
Rhode Island age 20 and younger
South Carolina age 20 and younger
South Dakota age 17 and younger
Tennessee all riders
Texas age 20 and younger
Utah age 17 and younger
Vermont all riders
Virginia all riders
Washington all riders
West Virginia all riders
Wisconsin age 17 and younger
Wyoming age 17 and younger
*Note that this list can potentially change as new laws can be passed and old laws repealed, so it's important to verify the laws yourself before embarking on a ride.
**Also note that some states will have laws requiring an insurance rider for any rider that chooses not to wear a helmet.