JW Marriott San Francisco Union Square
515 Mason Street, San Francisco
Checking price…
Top-rated location
Guests rate location 9.6/10.
Guests loved it
Great location
Popular amenities
About JW Marriott San Francisco Union Square
Luxurious Accommodations
Indulge in the chic and modern furnishings of our air-conditioned rooms at JW Marriott San Francisco Union Square. Enjoy premium film channels on a large LDC TV, relax in a marble bathroom with plush guest robes, and savor a freshly brewed coffee from your in-room machine.
Dining and Entertainment
Satisfy your cravings at Level III Restaurant with a delightful array of local and international cuisines. Unwind at Level III Bar with handcrafted cocktails, snacks, and a diverse selection of Northern California wines.
Convenient Location and Amenities
Explore nearby attractions like Fisherman’s Wharf, Oracle Park, Chinatown, and Ghirardelli Square, all just minutes away. Stay active at our modern fitness center or seek assistance from our attentive 24-hour front desk staff.
Good to know about JW Marriott San Francisco Union Square
Check-in
04:00 PM
Check-out
12:00 PM
Pets
Allowed
Children
Welcome
How JW Marriott San Francisco Union Square's price works
One flat fee
The price is what the hotel charges us plus one small, flat service fee — the same for every guest.
No surveillance pricing
We never use your device, location or browsing history to decide what you pay.
All-in, no surprises
Taxes and known fees are shown up front. What you see is what you book.
JW Marriott San Francisco Union Square reviews
Very good
333 reviews · updated December 2025
Guests loved
- + Great location
- + Friendly staff
- + Comfortable rooms
- + Clean hotel
Worth noting
- – High parking fees
- – Poor room cleanliness
- – Mediocre food and beverage options
Things to do near JW Marriott San Francisco Union Square
515 Mason Street, San Francisco
Open in Google Maps ↗JW Marriott San Francisco Union Square property amenities
Internet
- WiFi available
- Paid WiFi
Parking & transportation
- Parking
- Valet parking
- Private parking
- Accessible parking
Pools, spa & fitness
- Fitness facilities
- Fitness center
Food & drink
- Restaurant
- Room service
- Bar
- Breakfast in the room
- Shared lounge/TV area
- Snack bar
Accessibility
- Facilities for disabled guests
- Wheelchair accessible
- Toilet with grab rails
Things to do
- Terrace
Services & conveniences
- 24-hour front desk
- Lift / Elevator
- Safety deposit box
- Fax/photocopying
- Dry cleaning
- Currency exchange
- ATM/cash machine on site
Climate & comfort
- Non-smoking rooms
- Air conditioning
- Heating
- Non-smoking throughout
More
- Pets allowed
- Express check-in/check-out
- Meeting/banquet facilities
- Car hire
- Special diet menus - on request
- Electric vehicle charging station
- Lower bathroom sink
- Higher level toilet
- Outdoor furniture
- Wine/champagne
- Fruits
JW Marriott San Francisco Union Square room amenities
Bedroom
- Safety deposit box
- Linen
- Sofa bed
- Socket near the bed
Bathroom
- Shower
- Hair dryer
- Bathrobe
- Toilet
- Toilet paper
- Transfer shower
Entertainment
- TV
- Radio
Food & drink
- Coffee/tea maker
- Minibar
- Coffee machine
- Room service (limited hours)
Internet & phone
- Telephone
Comfort
- Air conditioning
More
- Desk
- Seating Area
- Hearing accessible
- Interconnected room(s) available
- Shampoo
Frequently asked questions about JW Marriott San Francisco Union Square
What are the check-in and check-out times at JW Marriott San Francisco Union Square?
Check-in starts at 04:00 PM and check-out is by 12:00 PM.
Does JW Marriott San Francisco Union Square have WiFi?
WiFi is available at JW Marriott San Francisco Union Square. Check your room's details for whether it's free or carries a charge.
Is parking available at JW Marriott San Francisco Union Square?
Yes, parking is available at JW Marriott San Francisco Union Square, including valet. A fee may apply — see the property's important information.
Does JW Marriott San Francisco Union Square serve breakfast?
Yes, breakfast is available at JW Marriott San Francisco Union Square. A fee may apply unless your rate includes it.
Is there a gym at JW Marriott San Francisco Union Square?
Yes, JW Marriott San Francisco Union Square has fitness facilities.
Does JW Marriott San Francisco Union Square have a restaurant?
Yes, there is on-site dining at JW Marriott San Francisco Union Square. There's also a bar or lounge.
Do the rooms at JW Marriott San Francisco Union Square have air conditioning?
Yes, rooms at JW Marriott San Francisco Union Square have air conditioning.
Does JW Marriott San Francisco Union Square offer room service?
Yes, room service is available at JW Marriott San Francisco Union Square (hours may be limited).
Is JW Marriott San Francisco Union Square wheelchair accessible?
JW Marriott San Francisco Union Square offers facilities for guests with disabilities. Contact the property to confirm the specifics for your needs.
Is JW Marriott San Francisco Union Square pet-friendly?
Yes, pets are allowed at JW Marriott San Francisco Union Square.
Is JW Marriott San Francisco Union Square family-friendly?
Yes, JW Marriott San Francisco Union Square welcomes families.
Is JW Marriott San Francisco Union Square non-smoking?
Yes, JW Marriott San Francisco Union Square is non-smoking throughout.
How far is JW Marriott San Francisco Union Square from Honolulu airport (HNL)?
It's about 2398 mi (straight-line) from Honolulu airport (HNL).
What's the closest beach to JW Marriott San Francisco Union Square?
The nearest is Lanikai Beach, about 2385 mi away (straight-line).
What is the cancellation policy at JW Marriott San Francisco Union Square?
It depends on the rate you pick — many rooms at JW Marriott San Francisco Union Square offer free cancellation. You'll see each room's exact policy before you book.
Are there extra fees at JW Marriott San Francisco Union Square?
Any mandatory property fees are shown in your all-in total before you book — no surprises at checkout.
What guest services does JW Marriott San Francisco Union Square offer?
JW Marriott San Francisco Union Square offers services such as laundry.
Is JW Marriott San Francisco Union Square a good place to stay?
Guests rate it 8.5/10 (Very good) across 333 reviews.
How does pricing work at JW Marriott San Francisco Union Square on travelpluscost?
One honest price: what the hotel charges us plus one small flat fee — the same for everyone, never based on your data. No hidden markup and no fake discounts.
JW Marriott San Francisco Union Square policies
Children and extra bed policy
Children of any age are allowed. Children up to and including 3 years old stay for free when using an available cot. Children up to and including 11 years old stay for free when using an existing bed. You haven't added any extra beds. Any type of extra bed or child's cot/crib is upon request and needs to be confirmed by management.
Pets
Pets are allowed. Charges may be applicable.
Groups
When booking more than 9 rooms, different policies and additional supplements may apply.
Internet
WiFi is available in the hotel rooms and costs USD 14.95 per 24 hours.
Parking
Private parking is possible on site (reservation is not needed) and costs USD 79 per day.
You need to know about JW Marriott San Francisco Union Square
Please note: There is an extra parking charge for over-sized vehicles. Please contact the hotel for further details. Please note: There is an electric car charging station available on the property. Please Note: The breakfast package is only for two adults (max value $30 per person or $60 for 2 adults).Guests are required to show a photo ID and credit card upon check-in. Please note that all Special Requests are subject to availability and additional charges may apply. In the event of an early departure, the property will charge you the full amount for your stay. A deposit may be required at the property.
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