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

515 Mason St, San Francisco, CA 94102

JW Marriott San Francisco Union Square gives San Francisco event planners 19 spaces to work with across 20,669 sq ft1,920 m² of function space. The largest room, Metropolitan Ballroom, hosts up to 500 guests. Review the layouts and seating capacities below, then test your setup in 3D — free.

Across its 19 spaces, 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.

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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

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
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 BCPlan this room →2,074 sq ft193 m²12.5 ft3.8 m1502181041755857
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
Skyline BPlan this room →1,000 sq ft93 m²10 ft3 m807036802427
Skyline BCPlan this room →2,000 sq ft186 m²10 ft3 m150180901806666
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.

Frequently asked questions

How many event spaces does JW Marriott San Francisco Union Square have?
JW Marriott San Francisco Union Square has 19 event spaces totaling 20,669 sq ft.
What is the largest event space at JW Marriott San Francisco Union Square?
The largest event space at JW Marriott San Francisco Union Square is Metropolitan Ballroom, which holds up to 500 guests across 4,352 sq ft.
What is the banquet capacity of Metropolitan Ballroom at JW Marriott San Francisco Union Square?
Metropolitan Ballroom seats up to 330 guests in a banquet layout.
How many people fit in Metropolitan Ballroom theater-style?
Metropolitan Ballroom holds up to 400 guests in a theater setup.
What are the dimensions of Metropolitan Ballroom?
Metropolitan Ballroom measures 68 × 64 ft (4,352 sq ft) with 12.5 ft ceilings.

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