Skip Main Navigation
  • Collapsed Find & Reserve Hotels, Deals & More
  • English–UK & Ireland
  • Collapsed Reservations View & Manage
  • Join Now Sign In or Join Marriott Rewards

515 Mason Street  San Francisco  California  94102  USA 
Check Rates & Availability
Check Rates & Availability

To make reservations by phone, dial freephone 0800 221 222 in the UK, 1 800 409 929 in Ireland, or view our regional telephone reservation numbers.

Find luxury in our Union Square hotel

Reap the benefits of a superb downtown location, luxury accommodations and brilliant amenities at the JW Marriott San Francisco Union Square. Situated in San Francisco's thriving Union Square neighborhood, we offer travelers easy access to all areas of the city. Arrive at our hotel and immediately feel at ease in our spacious guest rooms and suites, which feature thoughtful details and modern amenities. While nearby activities are innumerable, make time to enjoy facilities like our modern fitness center and our signature bar and restaurant, Level III. Once you're ready to venture out, discover the array of nearby attractions, including AT&T Park, Chinatown, Fisherman's Wharf and Ghirardelli Square. If you're visiting San Francisco on business, you'll love our hotel's proximity to the Financial District as well as our over 12,400 square feet of modern meeting room space. Come discover all that this remarkable city by the bay has to offer from the comfort of the JW Marriott San Francisco Union Square.

Map & Local Area

Marriott Rewards

Category:9· Points Needed Per Night

4.3 out of 5.0
Cleanliness
4.5
Service
4.4
89% of guests recommend this hotel

Key Amenities

Fitness center
Pet friendly
Meeting/event space
Parking

Explore Our Pacific Conference Center

Explore beyond the boardroom and experience the new Pacific Conference Center.

Learn More

Hotel Highlights

  • Plan an inspired meeting or wedding at our hotel. We offer an array of luxury venue spaces, the largest of which can accommodate up to 500 guests.
  • See the many sides of San Francisco from our Union Square hotel. We're located near AT&T Park and within walking distance of the Financial District.
  • Take advantage of luxury hotel perks like a 24-hour butler service, an on-site fitness center, a delicious full-service restaurant and much more.

Guest Rooms

Retreat into luxury in our San Francisco hotel suites

View All Guest Rooms

When you Book Direct on Marriott.co.uk

Only pay when you stay

Avoid upfront payments.

Exclusions apply

Change your mind

Modify or cancel your reservation.

Exclusions apply

Your room, your way

Request room extras when you book.

Conditions apply

It Pays to Book Direct

Deals & Promotions

Last-Minute Weekends

Free Wi-Fi. Mobile check-in. Exclusive benefits.

Join and they’re all yours.

View All Deals & Promotions

Check Room Rates & Availability