Exploring the Largest Natural Islands in the United States

The United States boasts over 18,600 natural islands, each with its unique geography and ecosystems. These islands range from lively tourist hubs to remote havens for wildlife. Among them, nine stand out for their sheer size and variety of landscapes.

The Scale of Natural Islands

To understand the significance of these islands, it’s essential to grasp their magnitude. The country’s largest island, Hawaii Island (or Big Island), spans 4,028 square miles, nearly double the size of Delaware. On the other hand, the smallest of the top nine is Unimak Island in Alaska, measuring 1,571 square miles. Alaska is notable for its abundance of islands; it has over 2,670 recognized islands, with Maine coming in second with just 1,906.

Big Island, Hawaii

Overview

Hawaii Island is not just the largest, but also a paradise for travelers seeking a diverse range of activities and experiences. Home to around 201,000 people, it’s less crowded than its more famous neighbors, Oahu and Maui.

Attractions

Nature enthusiasts can explore Hawaii Volcanoes National Park, marvel at lava landscapes, snorkel in clear waters at Kealakekua Bay, or relax on the black sands of Punaluʻu Beach. The summit of Mauna Kea offers breathtaking stargazing opportunities, making it a perfect getaway for both adventure seekers and those simply wanting to unwind.

Kodiak Island, Alaska

Overview

Coming in as Alaska’s largest island at 3,588 square miles, Kodiak is not just vast but also rich in natural beauty. The island is home to the fishing town of Kodiak, offering both charm and adventure.

Activities

Visitors can enjoy wildlife cruises, hiking trails, and exceptional sportfishing. The Kodiak National Wildlife Refuge is a highlight, giving you a chance to observe approximately 3,000 Kodiak brown bears in their natural habitat.

Puerto Rico, Puerto Rico

Overview

The largest Caribbean island under U.S. jurisdiction, Puerto Rico, spans 3,425 square miles and is the most populated on the list with around 3.1 million residents.

Cultural Hub

The historic capital San Juan provides a cultural backdrop for exploring colorful streets, historical architecture, and delicious local cuisine. Outdoor enthusiasts will appreciate the unique experience of hiking through El Yunque, the only tropical rainforest in the U.S. National Forest System, before unwinding on world-famous beaches.

Prince of Wales Island, Alaska

Overview

Prince of Wales Island measures 2,230 square miles and boasts a stunning 990 miles of coastline. It’s accessible via ferry or small plane, with Ketchikan serving as the main entry point.

Exploration Opportunities

Visitors can kayak along rugged coastlines, hike in lush forests, and fish in abundant waters. The island is known for its rich Alaskan Native heritage, providing opportunities to engage with local communities.

Chichagof Island, Alaska

Overview

Chichagof Island covers about 2,100 square miles and is part of the Alexander Archipelago. It’s known for its spectacular scenery and wildlife.

Wildlife Watching

Spotting whales from Point Frederick is a popular activity. Visitors often arrive by ferry or small plane to Sitka, a quaint town offering exciting fishing excursions and extensive hiking trails.

St. Lawrence Island, Alaska

Overview

Measuring 1,792 square miles, St. Lawrence Island is known for its remote setting and unique culture. Approximately 95% of the population identifies as Alaskan Native, maintaining traditions that date back thousands of years.

Birding and Culture

St. Lawrence Island offers incredible opportunities for birdwatching due to its strategic location along migratory paths. Visitors can catch regional flights to Gambell and Savoonga, immersing themselves in the local and cultural heritage.

Admiralty Island, Alaska

Overview

Admiralty Island spans 1,664 square miles and is sometimes referred to as “Fortress of the Bears,” housing the largest concentration of brown bears in North America.

Activities

Adventurers can explore Admiralty Island National Monument, which features nearly a million acres of pristine wilderness. Activities such as hiking, kayaking, and fishing attract nature lovers and serious outdoor enthusiasts alike, with many arriving by boat or floatplane from Juneau.

Nunivak Island, Alaska

Overview

Nunivak Island, with an area of 1,631 square miles, is home to a thriving population of muskoxen that far outnumber its human residents.

Unique Hunting Experience

While it isn’t a traditional tourist hotspot, regulated muskox hunting draws some visitors. Their unique ecosystem makes the island an intriguing destination for those interested in wildlife and remote exploration, typically reachable via small plane from Bethel.

Unimak Island, Alaska

Overview

The crown jewel of the Alaskan Peninsula, Unimak Island, spans 1,571 square miles. It’s renowned for its stunning landscapes, featuring lush forests and multiple active volcanoes.

Wilderness Exploration

With almost 93% of the island covered by dense forest, Unimak is a perfect destination for those who yearn for untouched wilderness. Visitors may catch sight of various wildlife, such as brown bears and caribou, while exploring this rugged terrain. However, reaching the island is challenging, with limited ferry service only available twice monthly in the summer.

These nine islands not only showcase the spectacular natural beauty of the United States but also offer diverse ecosystems, rich cultures, and outdoor adventures for those willing to explore. Whether you’re looking for relaxation or thrilling activities, these islands hold countless treasures waiting to be discovered.