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31st Union

5 S Ellsworth Ave, San Mateo, CA 94401-3910
+1 650-458-0049
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  • Excellent47%
  • Very good36%
  • Average13%
  • Poor2%
  • Terrible2%
Travellers talk about
“sandwich” (3 reviews)
“duck” (2 reviews)
“tacos” (2 reviews)
Closed Now
All hours
American, Spanish
$$ - $$$
5 S Ellsworth Ave, San Mateo, CA 94401-3910
All Details
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Reviews (36)
Traveller rating
Traveller type
Time of year

1 - 10 of 36 reviews

Reviewed 4 September 2017 via mobile

We've been coming here since they opened...and it just keeps getting better. For dinner the small plates are always changing and are always delicious. It's fun to be able to try, and share, a variety of dishes with your table-mates. They've got a great wine...More

Thank Craig A
Reviewed 19 August 2017

We went to 31st Union in San Mateo last night. Food was very good and the service was also very good. The pigs ears were not as good as advertised but the fish and chips were excellent. A very hip restaurant!

Thank Phil S
Reviewed 11 July 2017 via mobile

A welcome addition to San Mateo- small plates of very well prepared dishes, all interesting and satisfying- decent wine list- good cocktails and attentive staff- we will be back

Thank peter w
Reviewed 10 May 2017 via mobile

We had the duck confit for dinner which was full of flavour but would have wished the duck skin was crispier as that is the best part of the meal. There is a good range of beers available and interestingly wine on tap as well.

Thank daddy-0h
Reviewed 9 March 2017

Went here with family who lives in San Mateo. The food was excellent, nicely prepared. Two f the dishes of our party of 6 were lukewarm, however which was disappointing for them. We did not send back, however. The drinks were delicious, It was a...More

Thank Betsie49
Reviewed 13 November 2016 via mobile

First of all I was unable to eat at this restaurant due to a reservation error on their part. Because of this I will not attempt to eat here. I really wanted to try this place and made a reservation 3 days in advance for...More

Thank Denielle A
Reviewed 31 October 2016 via mobile

The atmosphere is nice, we were seated quickly,and our wait staff was friendly. That is the limit of the positive comments. Two of us ordered hamburgers which had to be sent back because they were severely under cooked (let's say super rare). When the burgers...More

Thank kcs r
31stUnion, Owner at 31st Union, responded to this reviewResponded 10 November 2016

Thank you for lending your feedback, kcs. We are sorry to hear you were not satisfied. We take pride in changing the oil in our fryer with absolute regularity every 2 days. It's hard to say exactly what you experienced, but it certainly was not...More

Reviewed 8 October 2016

Great place for good, farm to fork food. We had try - tip sandwich and braised chicken tacos with home made lemonade. Yummy!

Thank Copperbed83
Reviewed 11 September 2016 via mobile

Good food, attentive service although portions are a little small for the price. Will return to eat here again.

Thank Dooglas99
Reviewed 6 September 2016

We have wanted to try 31st Union since they opened as we regularly walk past the corner restaurant. We recently visited and unfortunately was disappointed. Yet, there were some positives so I still rate the restaurant 3 stars overall. The Vibe: 4 stars We went...More

Thank TravelBugged33
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Nearby Attractions
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175 reviews
.63 km away
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2.14 km away
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47 reviews
2.19 km away
Project Zen Massage & Bodywork
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Restaurant Details

Rating summary
  • Food
  • Value
Average prices
USD 7 - USD 25
Lunch, Dinner, Brunch
Restaurant features
Takeout, Outdoor Seating, Seating, Waitstaff, Television, Highchairs Available, Serves Alcohol, Full Bar, Accepts American Express, Accepts Mastercard, Accepts Visa, Free Wifi, Reservations, Parking Available, Street Parking, Free Off-Street Parking, Wheelchair Accessible, Wine and Beer, Accepts Credit Cards
Good for
Bar Scene
Open Hours
5:00 pm - 9:00 pm
10:00 am - 2:00 pm
5:00 pm - 9:30 pm
5:00 pm - 9:30 pm
11:30 am - 2:00 pm
5:00 pm - 9:30 pm
11:30 am - 2:00 pm
11:30 am - 2:00 pm
5:00 pm - 11:00 pm
5:00 pm - 11:00 pm
10:00 am - 2:00 pm
Location and Contact Information
  • Address: 5 S Ellsworth Ave, San Mateo, CA 94401-3910
  • Location: United States  >  California (CA)  >  San Mateo
  • Phone Number: +1 650-458-0049
  • E-mail
31st Union is the Peninsula's hottest eatery. As seen on KQED's "Check, Please!" & Recommended by the 2014 Bay Area Michelin Guide, raved about by food bloggers and locals alike, 31st Union has developed a cult following. 31st Union offers local, seasonal comfort food, a full bar featuring hand crafted cocktails, wines featuring the best California wine and craft beer. Open for lunch, dinner and happy hour. Available for private parties and catering.
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