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

480 Sutter St, San Francisco, CA 94108

With 14 event spaces across 16,914 sq ft1,571 m² of function space, San Francisco Marriott Union Square is a flexible choice for meetings and celebrations in San Francisco. The largest room, Union Square Ballroom, hosts up to 396 guests. Full capacity details for each room are below.

Between them, the 14 rooms accommodate theater-style sessions for up to 396, seated banquets for 192 and standing receptions for 120. 6 smaller rooms suit breakouts and board meetings. Per-room dimensions and every published setup figure are listed below.

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Floor plans

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

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Room capacities & dimensions

Room capacities and dimensions for San Francisco Marriott Union Square
SpaceSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
30th Floor Prefunction AreaPlan this room →504 sq ft47 m²8.5 ft2.6 m———30——
Cable CarPlan this room →791 sq ft73 m²10.4 ft3.2 m326620201821
City SuitePlan this room →400 sq ft37 m²8.5 ft2.6 m16329101215
Russian HillPlan this room →709 sq ft66 m²11 ft3.4 m405020252418
SavoyPlan this room →1,943 sq ft181 m²12.5 ft3.8 m5624884705436
Sutter IPlan this room →592 sq ft55 m²10.4 ft3.2 m244815151212
Sutter I, II & IIIPlan this room →2,059 sq ft191 m²10.4 ft3.2 m1122169270—55
Sutter IIPlan this room →568 sq ft53 m²10.4 ft3.2 m16401210129
Sutter IIIPlan this room →898 sq ft83 m²10.4 ft3.2 m408124252418
Telegraph Hill (Boardroom)Plan this room →375 sq ft35 m²9.5 ft2.9 m————12—
Union Square BallroomPlan this room →3,276 sq ft304 m²11.5 ft3.5 m192396156120—46
Union Square NorthPlan this room →1,612 sq ft150 m²11.5 ft3.5 m9621688602836
Union Square PrefunctionPlan this room →1,575 sq ft146 m²10 ft3 m———120——
Union Square SouthPlan this room →1,612 sq ft150 m²11.5 ft3.5 m9621484602836

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 San Francisco Marriott Union Square have?
San Francisco Marriott Union Square has 14 event spaces totaling 16,914 sq ft.
What is the largest event space at San Francisco Marriott Union Square?
The largest event space at San Francisco Marriott Union Square is Union Square Ballroom, which holds up to 396 guests across 3,276 sq ft.
What is the banquet capacity of Union Square Ballroom at San Francisco Marriott Union Square?
Union Square Ballroom seats up to 192 guests in a banquet layout.
How many people fit in Union Square Ballroom theater-style?
Union Square Ballroom holds up to 396 guests in a theater setup.
What are the dimensions of Union Square Ballroom?
Union Square Ballroom measures 52 × 63 ft (3,276 sq ft) with 11.5 ft ceilings.

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