Significance: Theodore Roosevelt Island's primary significance rests on its role as a memorial to Theodore Roosevelt and his devotion to the conservation of America's natural resources. However, the site also enjoys a rich history with several additional periods of significance.

The island, located in the Potomac River in Washington, D.C., is named Theodore Roosevelt Island to serve as a living memorial to the 26th President of the United States, who was a champion of conservation and the outdoors. Historically, the island was known by several names, most notably Mason's Island, as it was once owned by George Mason, the author of the Virginia Declaration of Rights. In 1931, the Theodore Roosevelt Association purchased the island and gifted it to the federal government with the intent of transforming the neglected, overgrown land into a park that would honor Roosevelt's legacy as a "great conservationist." In the 1930s, the Civilian Conservation Corps (CCC) and landscape architects worked to restore the island's natural "real forest" environment, removing non-native plants and creating miles of trails. Today, the island features a massive 17-foot bronze statue of Roosevelt at its center, surrounded by granite tablets inscribed with his philosophy on nature and citizenship. The name reflects the island's dual purpose: protecting a unique river ecosystem while providing a space for quiet reflection on the man who laid the foundation for the United States' National Park system.