Lowest crime rates in order for 2007, low to high:
Violent crime: Maine, North Dakota, Vermont, New Hampshire, South Dakota, Utah, Rhode Island, Wyoming, Idaho, Montana, Kentucky, West Virginia.
Property crime: South Dakota, New Hampshire, North Dakota, New York, New Jersey, Vermont, Massachusetts, Idaho, Pennsylvania, Virginia, Connecticut, Maine, Kentucky, Rhode Island, West Virginia
West Virgina is 12th with respect to violent crime and 15 with respect to property crime.
... but you are more than five times as likely to die in West Virginia as a result of being shot than you are here in Hawaii.
Source: U.S. Census Bureau, Table 297. Crime Rates by State, 2006 and 2007, and by Type