South Korea may be famous for its bustling cities, rich culture, and world-renowned cuisine, but one of its most underrated treasures lies just beyond the mainland—the islands. Scattered around the Korean Peninsula are over 3,000 islands, each offering something unique, from serene beaches and lush forests to volcanic landscapes and traditional fishing villages. Whether you’re a nature lover, an adventure seeker, or someone simply craving peace and quiet, the Korean islands are your perfect escape in 2025.
If you’re planning a trip to South Korea and want to explore beyond Seoul or Busan, here are ten of the best Korean islands that deserve a spot on your travel itinerary this year.
1. Jeju Island
No list of Korean islands would be complete without mentioning Jeju Island. Often dubbed the “Hawaii of Korea,” Jeju is the country’s largest island and its most famous. With its volcanic origins, the island boasts dramatic landscapes, from the towering Hallasan Mountain in the center to the mesmerizing lava tubes and waterfalls scattered throughout.
In 2025, Jeju continues to charm visitors with its mix of nature, culture, and fun. Hike up Hallasan, South Korea’s tallest peak, for panoramic views, or stroll through the scenic Olle Trails along the coast. Don’t forget to visit Seongsan Ilchulbong (Sunrise Peak), a UNESCO World Heritage site known for its sunrise views. And of course, relax at Hamdeok or Hyeopjae Beach with soft white sands and emerald waters. Jeju’s local cuisine—like black pork BBQ and abalone porridge—adds another layer to the experience.
2. Udo Island
Just a 15-minute ferry ride from Jeju, Udo Island is often called a miniature version of Jeju. But don’t be fooled by its size—this tiny island is packed with natural beauty and charm. What makes Udo special is its relaxed atmosphere. You can rent a bicycle, scooter, or even a quirky electric car and circle the island in just a few hours.
In 2025, Udo continues to draw those seeking peace, ocean breezes, and scenic photo ops. Stop by Seobin Baeksa, a beach with rare white coral sand that gives the shoreline a stunning glow. Enjoy peanut ice cream, the island’s signature treat, and take in views from Udobong Peak. With its open landscapes, windmills, and gentle pace, Udo offers a different side of Korea that’s worth every second.
3. Geoje Island
Located off the southeastern coast near Busan, Geoje Island blends natural beauty with deep historical roots. The island is South Korea’s second-largest and is known for its rugged coastlines, hidden coves, and blue seas. What makes Geoje unique is how it balances outdoor adventure with reminders of Korea’s past.
In 2025, travelers can explore the Windy Hill, a popular hilltop with sea views and swaying grass perfect for photos. The nearby Oedo Botania, a private island garden, is a must-see. Filled with exotic plants and European-style landscapes, it feels like stepping into a Mediterranean dream. Geoje is also home to the historic POW Camp Park, which offers a sobering but important look into the Korean War.
4. Jindo Island
Off Korea’s southwest coast lies Jindo Island, famous for its once-in-a-year natural phenomenon—the Jindo Sea Parting Festival. In 2025, this event is expected to attract thousands as the sea mysteriously parts, revealing a narrow path between Jindo and a neighboring island. It’s like Korea’s version of the biblical “Moses Miracle,” and you can actually walk across the ocean floor.
Aside from this event, Jindo is known for its traditional culture and folk music, particularly the Jindo Arirang. The island is also home to the Korean Jindo dog, a loyal breed that’s considered a national treasure. Whether you come for the miracle tides or to explore its quiet countryside, Jindo offers a unique and culturally rich island experience.
5. Ulleungdo Island
Far out in the East Sea lies Ulleungdo, a remote island that’s gaining attention for its untouched beauty. Formed by volcanic activity, the island features steep cliffs, crystal-clear waters, and dramatic landscapes that feel worlds away from the mainland. Ulleungdo is not your typical beach vacation spot—it’s for those who crave off-the-beaten-path adventure.
In 2025, Ulleungdo is ideal for hiking, fishing, and diving. The island’s coastal road offers jaw-dropping views around every corner, especially at places like Nari Basin and Dodong Lighthouse. You can also take a boat ride to Dokdo, a group of disputed islets that hold symbolic importance for Koreans. With fewer tourists and pristine surroundings, Ulleungdo is a dream for nature enthusiasts.
6. Namhae Island
Namhae, located on the southern coast, is often called the “treasure island” of Korea. With its mountainous terrain, terraced rice fields, and stunning ocean views, it’s a place that feels both traditional and modern. In 2025, Namhae remains a top destination for those seeking tranquility and beauty without the tourist crowds.
One of the island’s highlights is the German Village, built by Korean-German expatriates. It’s a colorful community with European-style houses, cafes, and even a beer festival. Namhae also offers the Boriam Hermitage, a mountaintop temple with breathtaking views of the South Sea. For nature lovers, the island’s silver grass fields and coastal walks are simply unforgettable.
7. Deokjeokdo Island
Just a two-hour ferry ride from Incheon, Deokjeokdo Island is a hidden getaway that’s perfect for travelers based in Seoul. It’s one of the easiest islands to reach, yet it feels far removed from city life. With sandy beaches, quiet forests, and laid-back vibes, it’s ideal for weekend trips.
In 2025, Deokjeokdo remains popular among locals and expats looking for quick relaxation. The main beaches, Seopori and Batjireum, are perfect for swimming and picnicking. Hiking up Bijobong Peak rewards you with views of the island and beyond. Because it’s relatively unknown to international tourists, Deokjeokdo offers a peaceful retreat without the crowds.
8. Ganghwado Island
Closer to the mainland but rich in history, Ganghwado Island is a perfect day trip or weekend stay from Seoul. The island played a major role in Korea’s history, especially during foreign invasions in the 19th century. Today, it offers a unique blend of historical landmarks, spiritual sites, and scenic beauty.
In 2025, Ganghwado continues to draw visitors with attractions like Goryeogung Palace Site, ancient fortresses, and Dolmen heritage sites that date back to prehistoric times. The island is also home to Jeondeungsa Temple, believed to be one of Korea’s oldest. Add in rolling hills, coastal bike trails, and a famous ginseng market, and you have an island that feels like a living museum wrapped in natural splendor.
9. Seonyudo Island
Located in the Gunsan archipelago, Seonyudo Island is part of a group of small islands connected by bridges and breakwaters. What makes this island special is its peaceful atmosphere, making it a great destination for travelers seeking serenity.
In 2025, Seonyudo continues to enchant visitors with quiet beaches, seafood eateries, and gentle cycling routes. The island’s seaside boardwalks are perfect for sunset strolls, and the surrounding islets—like Munyeodo and Jangjado—are easily accessible for exploration. With its slow pace and calming views, Seonyudo is perfect for couples, families, and solo travelers alike.
10. Oedo Island
Oedo is unlike any other island in Korea. Privately owned and developed as a botanical wonderland, Oedo Island is part of the Hallyeohaesang National Marine Park and accessible only by ferry. It’s a dreamlike destination where manicured gardens meet sweeping ocean views.
In 2025, Oedo Island continues to be a must-visit for garden lovers and Instagrammers. The island’s Mediterranean-inspired gardens are filled with exotic plants, marble statues, and cascading terraces. The views of the surrounding sea and cliffs only add to the island’s romantic appeal. Though the visit is time-limited due to ferry schedules, the visual feast is more than worth it.
Bottom Line
South Korea’s islands are more than just beach destinations—they’re full of culture, history, natural beauty, and soul-soothing serenity. Whether you’re marveling at a volcanic crater in Jeju, walking across the ocean during Jindo’s sea parting, or sipping iced coffee in Namhae’s German Village, each island offers a story waiting to unfold.
Exploring these ten Korean islands in 2025 means discovering a side of Korea that many travelers overlook. It’s a chance to slow down, reconnect with nature, and immerse yourself in landscapes that feel untouched by time. So, when you plan your trip to South Korea, don’t stop at the mainland. Let the islands welcome you with open arms and unforgettable adventures.
