which states have no seat belt laws?
By January 2007 25 states and the District of Columbia had primary seat belt laws, 24 had secondary seat belt laws, and New Hampshire had no laws. In 2009, Public Health Law Research published several evidence briefs summarizing the research assessing the effect of a specific law or policy on public health.
There are mandatory safety belt laws in all states except New Hampshire. In some states, these laws cover front-seat occupants only, but belt laws in 28 states and the District of Columbia cover all rear-seat occupants, too. Belt use laws in only 34 states and the District of Columbia are primary, meaning police may stop vehicles solely for belt law violations.