Are you planning a trip to Oahu and want to know some fun facts about Oahu? Keep scrolling to find out interesting facts about Honolulu and the rest of the island!
This list of fun facts about Oahu was written by Hawaii travel expert Marcie Cheung and may contain affiliate links, which means if you click on the link and purchase the item, I will receive an affiliate commission at no extra cost to you. All opinions remain my own.
Most people visit Oahu for the beaches and the surfing.
And yeah, those are amazing.
But after visiting this island 40+ times as both a Hawaii travel expert and professional tourist, I’ve collected some seriously cool stories about this place that go way beyond the typical tourist stuff.
Like, did you know there’s an actual royal palace right in downtown Honolulu?
Or that the North Shore has some of the best surf in the entire world during winter months?
Let me share what makes Oahu such a unique place.
The Only Royal Palace on American Soil
When I took my youngest son to Iolani Palace for the first time when he was 5, his mind was completely blown.
An actual palace. In America. With thrones and everything.
The palace started out as a coral building called Hale Ali’i back in 1845 when Hawaii’s royal capital moved from Maui to Honolulu.
Eventually they renamed it Iolani Palace, which is what we still call it today.
After the Hawaiian monarchy was overthrown in 1893, the palace sat neglected for decades until it was beautifully restored and reopened in 1978.
Now it’s one of the coolest places you can visit on Oahu. My son spent the whole tour asking questions about King Kalakaua and Queen Lili’uokalani.
It’s such a tangible way to connect with Hawaiian history and understand why Hawaii’s cultural heritage matters so much to locals today.
You can book tours of Iolani Palace if you want to see the throne room, the grand staircase, and learn about Hawaii’s royal past. Trust me, it’s worth it.
Check out my full guide to Iolani Palace.
Where Two-Thirds of Hawaii Lives
Here’s something that always surprises people: Oahu is home to about 1 million residents, which is roughly 70% of Hawaii’s entire population.
And the island isn’t even the biggest one.
When you’re sitting in traffic on H-1 or trying to find parking in Waikiki, this stat suddenly makes a lot of sense.
Oahu has earned its nickname “The Gathering Place” for good reason. People have been coming together on this island for generations.
During peak travel times like Christmas or summer vacation, it can feel even more crowded.
If you’re planning a trip and want to avoid the biggest crowds, I put together a free 7-day email course on how to plan a trip to Oahu that covers the best times to visit and how to work around the busy seasons.
Waikiki: From Swampland to Tourist Paradise
Speaking of crowds, Waikiki alone has around 30,000 hotel rooms. That’s wild when you consider what this area looked like 100 years ago.
“Waikiki” literally means “spouting water” in Hawaiian. The area used to be marshland full of taro farms, fishponds, rivers, and springs.
Mosquitoes carrying diseases were everywhere. The whole place was basically one big wetland.
In the early 1900s, they dug the Ala Wai Canal to drain everything and started building hotels.
Now Waikiki is this bustling beach town with stunning views of Diamond Head, world-class shopping, and some of the best restaurants on the island.
This is one of the best areas to stay in Oahu, and with all the choices, you will definitely find the right hotel for you.
It’s pretty incredible what they did with the space. You can still see the Ala Wai Canal running along the north side of Waikiki if you want to check out this engineering feat for yourself.
Need a place to stay? Check out hotels in Waikiki on Expedia to find something that fits your budget.
Five Million Visitors Can’t Be Wrong
Oahu welcomed about 5.8 million visitors in 2024. That’s a lot of leis.
I get why so many people choose Oahu for their Hawaii vacation. You’ve got Pearl Harbor, incredible hiking, the North Shore surf scene, amazing food, and easy access to pretty much everything.
Plus the international airport is here, so most people fly into Honolulu anyway.
If this is your first trip to Hawaii and you’re feeling overwhelmed by all the planning, I offer one-on-one Hawaii travel consultations where we can map out your perfect itinerary based on your family’s interests and travel style.
Only Four Freeways (Yes, Really)
Unlike most states where you’re constantly trying to remember which highway goes where, Oahu keeps it simple. There are exactly four freeways: H-1, H-2, H-3, and H-201. That’s it.
They all run through the Honolulu area and connect the city to Kaneohe, Mililani, and Ko Olina. But once you head to the North Shore? No freeways. Just smaller highways that wind around the island.
This actually makes navigation pretty easy, even for first-time visitors.
You’ll need a rental car to explore beyond Waikiki, and I always recommend booking early because rates can get expensive during peak season.
Pearl Harbor Changed Everything
December 7, 1941. That date lives in infamy for a reason. The attack on Pearl Harbor brought America into World War II and forever changed this island.
You can visit Pearl Harbor today and see the USS Arizona Memorial, the USS Bowfin submarine, and the USS Missouri battleship where Japan formally surrendered. It’s incredibly moving and absolutely worth a visit.
We’ve taken our kids several times, and each time I’m struck by how important it is to understand this piece of history.
I covered all the details about visiting in my podcast episode How to Visit Pearl Harbor on Oahu. Book your Pearl Harbor tour through Viator since tickets for the USS Arizona Memorial book up fast.
Welcome to Jurassic Park
Our family visits Kualoa Ranch every single time we’re on Oahu. My kids absolutely love it, and honestly, so do I.
This 4,000-acre working cattle ranch on the windward side served as the filming location for the original Jurassic Park.
You know that iconic scene where they first see the dinosaurs? That’s Kualoa Ranch, with those dramatic mountains in the background.
We’re obsessed with the UTV tour where you drive through the jungle and movie sites.
The movie tour is great too because you get to see filming locations from dozens of movies and TV shows like Jurassic World, 50 First Dates, and Hawaii Five-0.
If you’re planning to visit, definitely book your Kualoa Ranch tour in advance because they do sell out.
I talked all about what to expect and which tours are worth it on my podcast: Everything You Need to Know About Kualoa Ranch on Oahu.
North Shore Surf is World-Class
Hawaii is one of the first places for surfing, and it has plenty of great surfing spots throughout all the islands.
I’ve watched surfing on Oahu’s North Shore in winter, and the waves are absolutely massive. We’re talking 20-30 foot swells that attract the best surfers from around the world.
The Pipeline at Ehukai Beach in Haleiwa is legendary. During winter months, major surf competitions happen right here, and even if you’re not a surfer, watching these athletes take on those waves is breathtaking.
Duke Kahanamoku, the “Father of Modern Surfing,” was born on Oahu and spent most of his life here.
You can find his statue on Waikiki Beach with his arms outstretched in the classic aloha pose. He’s the reason surfing became the global sport it is today.
Want to learn to surf yourself? Book a surf lesson through Viator for a much safer introduction than the North Shore in winter. Waikiki’s gentle waves are perfect for beginners.
Diamond Head: Worth the Early Wake-Up
I’m going to be honest with you. My family put off hiking Diamond Head for years.
We’d drive past it constantly, saying “we should do that sometime,” and then never actually doing it.
Finally, I hiked it with my oldest son right after sunrise, and I kicked myself for waiting so long.
The views from the top are absolutely incredible. You can see all of Waikiki, the coastline, and the ocean stretching out forever.
It’s about a 1.5-mile round trip hike with some steep sections and stairs, but it’s totally doable for most fitness levels.
Go early to beat the heat and the crowds. You need to book your Diamond Head tickets in advance now since they started requiring reservations.
I covered all my tips and what to expect on the hike in this podcast episode: How to Hike Diamond Head Crater on Oahu.
Pro tip: Hire a Flytographer session for sunrise photos at the summit. You’ll save $20 with that link, and trust me, those photos will be amazing.
Hanauma Bay’s Underwater World
Hanauma Bay has around 400 species of fish swimming around in that protected bay. It’s one of the best snorkeling spots in Hawaii.
The bay is actually a volcanic crater that collapsed and filled with ocean water thousands of years ago.
Now it’s a marine life conservation district, which means you have to watch an educational video before you can enter the beach.
They’re serious about protecting the fish and coral here, and honestly, it shows. The underwater ecosystem is thriving.
Expect to see tons of tropical fish, parrotfish, and if you’re lucky, green sea turtles. Just remember: look but don’t touch.
Book your Hanauma Bay reservation early since they limit daily visitors to protect this special place.
Two (Extinct) Volcanoes
Oahu has two extinct volcanoes: Koolau and Waianae. Don’t worry, they’re not erupting anytime soon. The last volcanic activity here was about 2.5 million years ago.
Those dramatic mountains you see all over Oahu? That’s the Koolau Range, formed by the Koolau volcano.
Diamond Head and Hanauma Bay also came from past volcanic activity. It’s pretty cool to think about how this whole island was built by lava flows.
If you want to see an active volcano, you’ll need to head to the Big Island to visit Hawaii Volcanoes National Park. That’s a different trip entirely, and I cover all the details in my Big Island travel guide.
Polynesian Cultural Center: More Than a Tourist Attraction
My kids beg to go to the Polynesian Cultural Center every time we visit Oahu. They’re obsessed with the hands-on activities, especially learning to make fire.
Located in Laie on the North Shore, the PCC is the number one paid tourist attraction on Oahu.
It’s owned by The Church of Jesus Christ of Latter-day Saints, and many BYU students work here while going to school.
You can explore six different Polynesian island villages (Fiji, Tonga, Samoa, Aotearoa/New Zealand, Tahiti, and Hawaii), watch cultural demonstrations, and see the evening show with fire knife dancing.
It’s a full day experience, and my kids learn something new every time we go.
Book your PCC tickets through Hawaii Tours to get the best package deals.
Yes, You Can Mail a Coconut Home
When I was a kid visiting Hawaii with my grandma, I always wanted to mail a coconut home to show my friends back in Seattle. We never actually did it, but it’s totally possible.
You can literally bring a coconut to the post office, address it, stick stamps on it, and they’ll mail it. No box required. It’s one of those quirky Hawaii things that sounds fake but is 100% real.
If you want to try this, grab a coconut, write your address on it with a permanent marker, and take it to any Hawaii post office. They’ll weigh it and tell you how much postage you need.
It’s a fun souvenir that’ll definitely get some laughs when it arrives.
The Yellow Hibiscus Everywhere
Hawaii has nine official flowers: one for the entire state plus one for each of the eight main islands. Oahu’s official flower is the yellow hibiscus.
You’ll see hibiscus flowers everywhere on the island – in hotel landscaping, people’s yards, behind ears, and on Hawaiian Airlines planes. The yellow hibiscus is also Hawaii’s official state flower, so it gets double duty.
Fun fact: hibiscus flowers only last about 24 hours once they bloom, so if you see one, appreciate it while you can.
Planning Your Perfect Oahu Trip
After everything I’ve shared, you’re probably getting excited about your Oahu vacation. I don’t blame you. This island has stolen my heart over and over again during my 40+ visits.
Want more insider tips? My Oahu travel guide for families has detailed daily itineraries, restaurant recommendations, and everything you need to plan the perfect trip.
Or check out my podcast How to Plan a Trip to Oahu for even more advice.
And if you’re still feeling overwhelmed? Book a Hawaii travel consultation with me. I’ll help you figure out the best areas to stay, which activities your family will actually enjoy, and how to make the most of your time without feeling rushed.
Oahu is special in ways most tourists never discover. Now you’re armed with the inside scoop to experience it like a local. Safe travels, and don’t forget to try the malasadas.
Looking for more Hawaii facts? Check out 50 fun facts about Hawaii, sea turtle facts for kids, pineapple facts for kids, and learn about Hawaii geckos.
