State parks are parks or other protected areas managed at the federated state level within those nations which use "state" as a political subdivision. State parks are typically established by a state to preserve a location on account of its natural beauty, historic interest, or recreational potential. There are state parks under the administration of the government of each U.S. state, and of some states of Mexico. The term is also used in Australia, though the distinction between state and national parks there is different. The equivalent term in Canada is provincial park. Similar systems of local government maintained parks exist in other countries, but the terminology varies.
State parks are thus similar to national parks, but under state rather than federal administration. Similarly, local government entities below state level may maintain parks, e.g., regional parks or county parks. In general, state parks are smaller than national parks, with a few exceptions such as the Adirondack Park in New York and Anza-Borrego Desert State Park in California.
In Australia, both state and national parks are under the administration of state governments, because the first national parks predate the federation of Australia. State parks have a lesser degree of significance and protection (for instance, they are frequently logged).
Read more about State Park: State Parks in The U.S.