While there is no single, official ranking of the absolute largest state parks across the entire U.S., the title belongs to those in Alaska, which are on an entirely different scale from parks in the lower 48 states.
Based on available data, here are the top 10 biggest state parks in the US by acreage.
| Rank | State Park Name | State | Approximate Size (Acres) | Key Features & Notes |
|---|---|---|---|---|
| 1 | Wood-Tikchik State Park | Alaska | ~1,600,000 | A vast, remote, interconnected lake system; larger than some U.S. states. |
| 2 | Anza-Borrego Desert State Park | California | ~640,000+ | The largest state park in the contiguous 48 states; features slot canyons, palm oases, and wildflowers. |
| 3 | Chugach State Park | Alaska | ~495,000 | Spans from the outskirts of Anchorage into the wilderness; features mountains, glaciers, and coastlines. |
| 4 | Big Bend Ranch State Park | Texas | ~311,000 | Adjacent to Big Bend National Park; features the Chihuahuan Desert, river canyons, and historic ranchland. |
| 5 | Adirondack Park | New York | 6,000,000 (240,000)* | *Technically a mix of public and private lands (NYS manages ~2.5M acres); larger than Yellowstone, Yellowstone, Yosemite, and Grand Canyon combined. |
| 6 | Desert Sunlight State Park | Alaska | ~170,000 | Remote park managed by Alaska State Parks; noted for its massive size. |
| 7 | Starvation Lake State Park | Alaska | ~142,000 | Located on the edge of the Alaska Range; a destination for fishing and paddling. |
| 8 | Custer State Park | South Dakota | ~71,000 | Famous for its scenic wildlife loop and one of the world's largest free-roaming bison herds. |
| 9 | Makoshika State Park | Montana | ~11,500 | Montana's largest state park; known for badlands and dinosaur fossils. |
| 10 | Humboldt Redwoods State Park | California | ~53,000 | Protects the world's largest remaining contiguous old-growth coast redwood forest. |
💡 What Makes These Parks Special
The Alaska Factor: As the table shows, Alaska dominates the top of this list. Wood-Tikchik State Park is over 1.6 million acres—larger than the state of Delaware. These parks are incredibly remote and offer a true wilderness experience with few facilities or roads.
The Contiguous 48 Giant: Anza-Borrego Desert State Park in California is the undisputed champion of the lower 48 states. Its 640,000+ acres of deserts, canyons, and mountains provide a massive playground for hiking, off-roading, and stargazing.
The "Hybrid" Park: Adirondack Park in New York is a unique case. Unlike traditional parks, it's a "Blue Line" boundary within which exists a mix of over 2.5 million acres of state-owned land and over 100 towns and villages. It is by far the largest publicly protected area in the contiguous U.S.
More Than Just Size: Some parks are famous for specific features. Big Bend Ranch offers a more rugged, primitive alternative to its famous national park neighbor. Custer is a wildlife-viewing paradise, and Humboldt Redwoods lets you walk among the tallest trees on Earth.
I hope this list helps you find your next great adventure. Are you more interested in the expansive wilderness of Alaska or the unique desert landscapes of California and Texas?