Straits State Park is a state park in the U.S. state of Michigan located in St. Ignace, Mackinac County, on the northern shore of the Straits of Mackinac. The Father Marquette National Memorial and park is also located within the state park boundaries. The park is equipped with 255 campsites and offers several ideal locations for viewing the Mackinac Bridge.

Straits State Park was established in 1924 as a simple day park with the entrance located at the corner of Paro and Hombach street. In the mid 1940s the park was redesigned to allow for approximately 32 tent campsites along the shores of the Straits of Mackinac. Around this time, the entrance to the park changed to the corner of Paro and Church street.

In the early 1950s the park expanded north and about 90 new campsites were created to accommodate traveling campers and their travel trailers in the southern park along the Straits of Mackinac. The park entrance remained the same as it was easily accessible to travelers arriving in St. Ignace from the Lower Peninsula by way of the car ferry which docked only a half mile east of the park. The new northern land was left undeveloped.

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.