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

480 Sutter St, San Francisco, CA 94108

12 rooms · largest space: Union Square Ballroom, 3,276 sq ft304 m²

With 12 event rooms, San Francisco Marriott Union Square is a flexible choice for meetings and celebrations in San Francisco. The largest space is Union Square Ballroom, 3,276 sq ft304 m² (divisible into 2 sections). It holds up to 396 guests. Full capacity details for each room are below.

Plan an event in Union Square Ballroom: open a free to-scale layout seating 150 at round tables in its 52 × 63 ft footprint at floors.live/start — no account needed.

Between them, the 12 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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Unverified listing — compiled from San Francisco Marriott Union Square’s published information. Venue staff can verify capacities and setups free: floors.live/venues/us/california/san-francisco/san-francisco-marriott-union-square/?claim=1.

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

12 rooms, 14 configurations. Combined and divided set-ups are listed under their room.

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
1 configuration with Sutter I
Combined and divided set-ups that include Sutter I
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
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 NorthPlan this room →1,612 sq ft150 m²11.5 ft3.5 m9621688602836
1 configuration with Union Square North
Combined and divided set-ups that include Union Square North
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
Union Square BallroomPlan this room →3,276 sq ft304 m²11.5 ft3.5 m192396156120—46
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.

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 San Francisco Marriott Union Square?

San Francisco Marriott Union Square has 12 rooms. The largest space is Union Square Ballroom, 3,276 sq ft (52 × 63 ft). Every room's dimensions and seating capacity by setup are listed on this page. San Francisco Marriott Union Square's own floor plans are published on its website, linked from this page.

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

San Francisco Marriott Union Square has 12 rooms. 14 configurations are listed on this page.

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

Union Square Ballroom, 3,276 sq ft (divisible into 2 sections): 52 × 63 ft, 192 banquet / 396 theater.

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

Up to 192 in Union Square Ballroom. The next largest room, Sutter I, II & III, seats 112.

Can Union Square Ballroom be divided?

Yes. Union Square Ballroom divides into 2 sections: Union Square North, Union Square South.

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

The highest ceiling is 12.5 ft, in Savoy.

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