Missouri car seat safety laws require children under age four and under 40 pounds to ride in a federally approved child car seat that is appropriate for the child's age and size. Children ages 4 through 7 who weigh more than 40 pounds but less than 80 pounds or are not at least 4'9" tall must ride in an appropriate child car seat or booster seat. Children ages 8 to 18 must wear a seat belt. Missouri law also prohibits children under age 18 from riding in an unenclosed truck bed.
More State Car Seat Laws and Car Seat Safety Resources