A state constitution is the governing document of a U.S. state, comparable to the United States Constitution, which is the governing document of the United States. Some states have had multiple constitutions, and since each state drafts its own, there is great diversity between them, though all have some basic concepts in common.
Twenty states have had one state constitution since statehood. Louisiana has had the most, with 11 state constitutions. On average, states have had between two and three constitutions since statehood. In the U.S., 49 of 50 states require voter approval for the ratification of state constitutional amendments. Delaware does not require voters to approve state constitutional amendments.