States that require front/back license plates:
Alaska, American Samoa, California, Colorado, Connecticut, District of Columbia, Hawaii, Idaho, Illinois, Iowa, Maine, Maryland, Massachusetts, Minnesota, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New York, North Dakota, Ohio, Oregon, Rhode Island, South Dakota, Texas, Utah, Vermont, Virginia, Washington, Wisconsin, Wyoming, British Columbia, Manitoba (newly issue plates), New Brunswick, Newfoundland, Nova Scotia, Ontario, Saskatchewan <hr> States that require only a rear license plate :
Alabama, Arizona, Arkansas, Delaware, Florida, Georgia, Guam, Indiana, Kansas, Kentucky, Louisiana, Michigan, Mississippi, New Mexico, North Carolina, Oklahoma, Pennsylvania, Puerto Rico, South Carolina, Tennessee, Virgin Islands, West Virginia, Alberta, Quebec, Manitoba (New plates are front/back in 1997), Northwest Territories, Prince Edward Island, Yukon Territory