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1099 Santa Ynez Ave, Los Osos, CA 93402-2742
+1 805-528-0779
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  • Excellent62%
  • Very good32%
  • Average3%
  • Poor2%
  • Terrible1%
Travelers talk about
“burger” (115 reviews)
“onion rings” (14 reviews)
“beef” (7 reviews)
Closed Now
American, Fast Food
$$ - $$$
1099 Santa Ynez Ave, Los Osos, CA 93402-2742
All Details
Write a ReviewReviews (164)
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1 - 10 of 159 reviews

Reviewed 1 week ago

Best burgers ever! They are good sized servings and you will be full after. Get the fried zucchini which is amazing also! They also have a free burger on your birthday. Also try their huge burger challenge! I try to come here every time I...More

Thank Arvin R
Reviewed 4 weeks ago via mobile

Just a quick stop for dinner. Burger and fries great. Friendly help and easy dining. Lot of items on menu.

Thank Jellybeandean
Reviewed 5 weeks ago via mobile

They call them juicy. Really they’re just plain greasy and can give you a good case of indigestion. I live in Los Osos and drive by Sylvester’s all the time but won’t go back. If I want a good burger in Los Osos, I go...More

Thank Roostertail1
Reviewed July 9, 2018 via mobile

I've been going to Sylvester's for years and have not been disappointed. My last visit was to try the daily hot dog special. Bacon wrapped with grilled Jalapeno and bell peppers with Sylvester's sauce on a toasted bun- Excellent! Often busy but they have enlarged...More

Thank SailingCC
Reviewed June 16, 2018

You gotta love a down to earth place like Sylvester's. 5 of stopped in for lunch, 5 different types of burgers and we all were happy. The onion rings were fantastic. Price was good, service great. I'm definitely going back.

Thank Anton V
Reviewed April 1, 2018 via mobile

This place was great back in the day, but it’s not quite the same. Service is well below average and the atmosphere is gross and sticky. Food still tastes good, but get it to go.

Thank Familymancali
Reviewed March 16, 2018 via mobile

I’m not sure this very popular place deserves all of the "best burger" reviews it seems to get, but, nonetheless the burgers are very good as are the rotating beer choices available. My wife and I each ordered and enjoyed the 1/2 pound California Burger....More

Thank Jon R
Reviewed February 9, 2018

This was my 4th or 5th visit to Sylvester's and it is without a doubt the best burger joint in Los Osos, if not in the entire San Luis Obispo County. Yes, $11 and change for a half-pound burger topped with Swiss cheese and smothered...More

Thank rmongoos
Reviewed February 5, 2018

Every time I have gone to this location the staff has been very friendly. The food is really good, has a nice place to sit outside when the weather is cooperative.

Thank Eric M
Reviewed February 4, 2018 via mobile

While $10 for a burger without fries can be a little hard to swallow (sorry), you may find the food here is worth it. Tastiest burger beef I've ever had. Really great garlic fries (double fried, unlike the regular fries, but you can get the...More

Thank Maggers
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Restaurant Details

Rating summary
  • Food
  • Value
Lunch, Dinner
Restaurant features
Takeout, Outdoor Seating, Seating, Wheelchair Accessible, Serves Alcohol
Good for
Families with children, Kids
Open Hours
11:00 AM - 9:00 PM
11:00 AM - 9:00 PM
11:00 AM - 9:00 PM
11:00 AM - 9:00 PM
11:00 AM - 9:00 PM
11:00 AM - 9:00 PM
11:00 AM - 9:00 PM
Location and Contact Information
  • Address: 1099 Santa Ynez Ave, Los Osos, CA 93402-2742
  • Location: United States  >  California (CA)  >  San Luis Obispo County  >  Los Osos
  • Phone Number: +1 805-528-0779
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