JW Marriott San Francisco Union Square — Event Spaces, Floor Plans & Capacities

515 Mason St, San Francisco, CA 94102

17 rooms · largest space: Metropolitan Ballroom, 4,352 sq ft404 m²

JW Marriott San Francisco Union Square gives San Francisco event planners 17 rooms to work with. The largest space is Metropolitan Ballroom, 4,352 sq ft404 m². It holds up to 500 guests. Review the layouts and seating capacities below, then test your setup in 3D — free.

Plan an event in Metropolitan Ballroom: open a free to-scale layout seating 250 at round tables in its 68 × 64 ft footprint at floors.live/start — no account needed.

Across its 17 rooms, JW Marriott San Francisco Union Square handles theater-style sessions for up to 400, seated banquets for 330 and standing receptions for 500. 10 smaller rooms suit breakouts and board meetings. Exact figures for every room and setup style are in the chart below.

Plan your event in this space — free

Unverified listing — compiled from JW Marriott San Francisco Union Square’s published information. Venue staff can verify capacities and setups free: floors.live/venues/us/california/san-francisco/jw-marriott-san-francisco-union-square/?claim=1.

Floor plans

Detailed floor plans for JW Marriott San Francisco Union Square are published on the venue’s official site.

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Room capacities & dimensions

17 rooms, 19 configurations. Combined and divided set-ups are listed under their room.

Room capacities and dimensions for JW Marriott San Francisco Union Square
SpaceSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
BoardroomPlan this room →252 sq ft23 m²9 ft2.7 m10———10—
MasonPlan this room →616 sq ft57 m²8 ft2.4 m——20—2018
Metropolitan APlan this room →2,074 sq ft193 m²12.5 ft3.8 m1502181041755857
1 configuration with Metropolitan A
Combined and divided set-ups that include Metropolitan A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
Metropolitan BCPlan this room →2,074 sq ft193 m²12.5 ft3.8 m1502181041755857
Metropolitan BPlan this room →1,088 sq ft101 m²12.5 ft3.8 m8096661003030
Metropolitan BallroomPlan this room →4,352 sq ft404 m²12.5 ft3.8 m3304002345006064
Metropolitan CPlan this room →986 sq ft92 m²12.5 ft3.8 m80118661003030
PostPlan this room →270 sq ft25 m²8 ft2.4 m——10—108
PowellPlan this room →324 sq ft30 m²8 ft2.4 m——12—1210
Salon IPlan this room →500 sq ft46 m²9 ft2.7 m405030452424
Salon IIPlan this room →315 sq ft29 m²9 ft2.7 m202818251614
Salon IIIPlan this room →353 sq ft33 m²9 ft2.7 m304024351615
Skyline APlan this room →1,825 sq ft170 m²10 ft3 m120128751505054
1 configuration with Skyline A
Combined and divided set-ups that include Skyline A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
Skyline BCPlan this room →2,000 sq ft186 m²10 ft3 m150180901806666
Skyline BPlan this room →1,000 sq ft93 m²10 ft3 m807036802427
Skyline CPlan this room →1,000 sq ft93 m²10 ft3 m707036802827
SutterPlan this room →529 sq ft49 m²8 ft2.4 m——20—1818
TaylorPlan this room →486 sq ft45 m²8 ft2.4 m——20—2018
TerracePlan this room →625 sq ft58 m²10 ft3 m30——40——

Figures from published venue data; blank cells mean the venue hasn’t published that number. Verify final counts with the venue.

Sizing another room? Try the event room capacity calculator or the floor plan scale converter, or compare the largest event spaces in San Francisco.

Frequently asked questions

What is the floor plan of JW Marriott San Francisco Union Square?

JW Marriott San Francisco Union Square has 17 rooms. The largest space is Metropolitan Ballroom, 4,352 sq ft (68 × 64 ft). Every room's dimensions and seating capacity by setup are listed on this page. JW Marriott San Francisco Union Square's own floor plans are published on its website, linked from this page.

How many event rooms does JW Marriott San Francisco Union Square have?

JW Marriott San Francisco Union Square has 17 rooms. 19 configurations are listed on this page.

What is the largest space at JW Marriott San Francisco Union Square?

Metropolitan Ballroom, 4,352 sq ft: 68 × 64 ft, 330 banquet / 400 theater.

How many people can JW Marriott San Francisco Union Square seat for a banquet?

Up to 330 in Metropolitan Ballroom. The next largest room, Skyline BC, seats 150.

What is the ceiling height at JW Marriott San Francisco Union Square?

The highest ceiling is 12.5 ft, in Metropolitan A.

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