We noticed that you're using an unsupported browser. The TripAdvisor website may not display properly.We support the following browsers:
Windows: Internet Explorer, Mozilla Firefox, Google Chrome. Mac: Safari.

Royal SIAM Thai Restaurant

Is this your business?
70 Mamo St, Hilo, Island of Hawaii, HI 96720-2954
+1 808-238-5068
Map updates are paused. Zoom in to see updated info.
Reset zoom
Updating Map...
  • Excellent46%
  • Very good43%
  • Average2%
  • Poor7%
  • Terrible2%
Travelers talk about
“thai food” (7 reviews)
“shrimp satay” (2 reviews)
“yellow curry” (2 reviews)
Closed Now
11:00 am - 8:30 pmAll hours
Asian, Thai
$$ - $$$
70 Mamo St, Hilo, Island of Hawaii, HI 96720-2954
All Details
Write a Review
Reviews (39)
Traveler rating
Traveler type
Time of year

11 - 20 of 33 reviews

Reviewed April 10, 2016

If you are looking for an excellent, replenishing menu that has something for everyone, Royal Siam is your restaurant! The exquisite Thai cuisine, its amazing taste, cultural décor, friendly staff, and quiet, comfortable atmosphere has had our family coming back weekly for more than twenty...More

Thank FMB041
Reviewed March 25, 2016 via mobile

Like most Thai places the decor is well...serviceable. The food was great! From the fresh shrimp rolls to the shrimp satay or the Pad See Ew, the Green Curry Chicken and the Pad Thai were all great! Very reasonably priced. Our family of 6 feasted...More

Thank JaysonC1974
Reviewed March 25, 2016

Our family of 5 had a delicious dinner here for about $70US. Excellent service, very flavourful, and large portions (took home a few doggie bags). Nothing fancy, but good thai food!

Thank christine20000
Reviewed January 16, 2016

Friends who live in Hilo took us here for dinner while we were visiting. Very good Thai. Good service.

Thank Bruce B
Reviewed November 18, 2015

The restaurant is located on Mamo Street across from the Wednesday/Saturday market in downtown Hilo. Aside from the fact that it is an oasis from the rain and heat, the food was quite good and reasonably priced. Service was excellent. All in all, a good...More

Thank LBlank-SalinasCA
Reviewed August 19, 2015

Very bland over priced food, not at all interesting. No ambience at all. We only went in because we had no other ideas and were new in town. Never again

Thank gardengirl54
Reviewed March 31, 2015

This is our must-go-to restaurant when in Hilo! The food is consistently good! The menu is large, but we can't get enough of the Green Curry. We usually do take-out, but there is a pleasant dining room as well. It is right up the street...More

Thank Karrie B
Reviewed March 23, 2015

I love Thai Food. If you like Thai Food also, go to Naung Mai, which is up another block and behind the Garden shop. It is not fancy in ambiance like Royal SIAM but the food is much, much better and in bigger quantity. The...More

1  Thank donnaspeaks
Reviewed February 18, 2015 via mobile

The food is good and the service was better than most of the places I've been here in Hilo. Food was fresh. ..came out quickly and delicious. The menu was diverse and they also serve bento....looked good....locals eat here....good sign..

Thank Mazuraj
Reviewed February 16, 2015

Hilo Siam Thai on Mamo st in Hilo (same as above name). Being a vegetarian most places only have the usual mushrooms, eggplant and squash to offer. This nice, clean, friendly restaurant had a better variety. I had the tofu with vega which were all...More

Thank Gail L
Nearby Restaurants
Pineapple's Island Fresh Cuisine
1,235 reviews
.04 miles away
Cafe Pesto Hilo Bay
1,482 reviews
.06 miles away
Naung Mai Thai Kitchen
150 reviews
.06 miles away
Moonstruck Patisserie
131 reviews
.07 miles away
Nearby Attractions
Hilo Farmers Market
688 reviews
.04 miles away
Extreme Exposure Fine Art Gallery
39 reviews
.11 miles away
Sugar Coast Candy
24 reviews
.09 miles away
One Gallery
22 reviews
.06 miles away
Questions & Answers
Get quick answers from Royal SIAM Thai Restaurant staff and past visitors.
Note: your question will be posted publicly on the Questions & Answers page.
Posting guidelines
Improve this listing

Restaurant Details

Rating summary
  • Food
  • Value
Dinner, Lunch
Restaurant features
Takeout, Seating, Waitstaff, Wheelchair Accessible
Good for
Families with children, Kids
Open Hours
5:00 pm - 8:00 pm
11:00 am - 8:30 pm
11:00 am - 8:30 pm
11:00 am - 8:30 pm
11:00 am - 8:30 pm
11:00 am - 8:30 pm
11:00 am - 8:30 pm
Location and Contact Information
  • Address: 70 Mamo St, Hilo, Island of Hawaii, HI 96720-2954
  • Location: United States  >  Hawaii (HI)  >  Island of Hawaii  >  Hilo
  • Phone Number: +1 808-238-5068
Is This Your TripAdvisor Listing?
Own or manage this property? Claim your listing for free to respond to reviews, update your profile and much more. Claim Your Listing