[3] It is named after Isaac Stephenson,[3][4] a prominent politician and lumberman in Marinette at the turn of the 20th century.

[5] US Highway 41 runs across it, which provides access to the park's pavilion, gazebo, playground, and picnic areas.

[5] A footbridge to the island connects from the Marinette side of the river, adjacent to the Wisconsin Tourist Information building and the Stephenson Public Library.

[5][6] The island is a popular place for access to the Menominee River for sport fishing and launching recreational boats.

)[4] When Marinette had a Fourth of July celebration, fireworks would be launched from Stephenson Island.