The Westin DC Downtown — Event Spaces, Floor Plans & Capacities

999 9th St NW, Washington, DC 20001

36 rooms · 77,872 sq ft7,235 m² of event space, per the hotel

The Westin DC Downtown gives Washington event planners 36 rooms to work with and 77,872 sq ft7,235 m² of event space, per the hotel. The largest space is Potomac Ballroom, 19,032 sq ft1,768 m². It holds up to 2,500 guests. Review the layouts and seating capacities below, then test your setup in 3D — free.

Plan an event in Potomac Ballroom: open a free to-scale layout seating 1,200 at round tables in its 156 × 122 ft footprint at floors.live/start — no account needed.

Across its 36 rooms, The Westin DC Downtown handles theater-style sessions for up to 1,800, seated banquets for 1,200 and standing receptions for 2,500. 9 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 The Westin DC Downtown’s published information. Venue staff can verify capacities and setups free: floors.live/venues/us/washington-dc/washington/the-westin-dc-downtown/?claim=1.

Floor plans

Detailed floor plans for The Westin DC Downtown are published on the venue’s official site.

View official floor plans at Marriott ↗Plan your event in this space — free

Work at The Westin DC Downtown? to publish your official floor plans and 360° tours here — free.

Room capacities & dimensions

55 configurations listed. Combined and divided set-ups are listed under their room.

Room capacities and dimensions for The Westin DC Downtown
SpaceCeiling
Anacostia BallroomPlan this room →9,022 sq ft838 m²18 ft5.5 m380——45080—
Anacostia Salon DPlan this room →2,160 sq ft201 m²18 ft5.5 m1202501201503045
1 configuration with Anacostia Salon D
Combined and divided set-ups that include Anacostia Salon D
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
Anacostia Salon D&EPlan this room →4,337 sq ft403 m²18 ft5.5 m2804302403008070
Anacostia Salon EPlan this room →2,187 sq ft203 m²18 ft5.5 m1202501201503045
Anacostia Salon FPlan this room →4,685 sq ft435 m²10 ft3 m1501401001803025
Dumbarton OaksPlan this room →621 sq ft58 m²10 ft3 m203024401816
Foundry BranchPlan this room →667 sq ft62 m²10 ft3 m303024401816
HickoryPlan this room →572 sq ft53 m²10 ft3 m304024502222
Magnolia APlan this room →2,421 sq ft225 m²9.5 ft2.9 m100120961203218
1 configuration with Magnolia A
Combined and divided set-ups that include Magnolia A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
Magnolia BallroomPlan this room →3,658 sq ft340 m²9.5 ft2.9 m180——200——
Magnolia BPlan this room →1,237 sq ft115 m²9.5 ft2.9 m506050702012
Meeting Room 1Plan this room →324 sq ft30 m²10 ft3 m1020152012—
5 configurations with Meeting Room 1
Combined and divided set-ups that include Meeting Room 1
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
Meeting Rms 10/11Plan this room →1,188 sq ft110 m²10 ft3 m60100561003434
Meeting Rms 12/13Plan this room →1,443 sq ft134 m²10 ft3 m7060561103032
Meeting Rms 12/13/14Plan this room →2,183 sq ft203 m²10 ft3 m120120721504540
Meeting Rms 13/14Plan this room →1,360 sq ft126 m²10 ft3 m7070561103232
Meeting Rms 8/9Plan this room →1,566 sq ft145 m²10 ft3 m90100651204042
Meeting Room 10Plan this room →567 sq ft53 m²10 ft3 m305028502426
Meeting Room 11Plan this room →621 sq ft58 m²10 ft3 m305028502426
Meeting Room 12Plan this room →740 sq ft69 m²10 ft3 m507037602430
Meeting Room 13Plan this room →740 sq ft69 m²10 ft3 m507037602430
Meeting Room 14Plan this room →680 sq ft63 m²10 ft3 m506045602430
Meeting Room 15Plan this room →754 sq ft70 m²10 ft3 m6010045903230
Meeting Room 16Plan this room →812 sq ft75 m²10 ft3 m6010060803235
Meeting Room 2Plan this room →864 sq ft80 m²10 ft3 m6010045803236
Meeting Room 3Plan this room →864 sq ft80 m²10 ft3 m6010045803236
Meeting Room 4Plan this room →900 sq ft84 m²10 ft3 m6010045803232
Meeting Room 5Plan this room →950 sq ft88 m²10 ft3 m6010045803635
Meeting Room 6Plan this room →528 sq ft49 m²10 ft3 m405028502020
Meeting Room 7Plan this room →572 sq ft53 m²10 ft3 m304024502028
Meeting Room 8Plan this room →812 sq ft75 m²10 ft3 m406036602026
Meeting Room 9Plan this room →754 sq ft70 m²10 ft3 m406036602026
Potomac BallroomPlan this room →19,032 sq ft1,768 m²16 ft4.9 m1,2001,8009502,500——
1 configuration with Potomac Ballroom
Combined and divided set-ups that include Potomac Ballroom
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
Potomac Ballroom 2 & 3Plan this room →12,322 sq ft1,145 m²16 ft4.9 m6601,2005871,40094120
Potomac Salon 1Plan this room →6,466 sq ft601 m²16 ft4.9 m3606403007007090
1 configuration with Potomac Salon 1
Combined and divided set-ups that include Potomac Salon 1
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
Potomac Ballroom Salon 1 & 2Plan this room →12,322 sq ft1,145 m²16 ft4.9 m6601,2405871,35088120
Potomac Salon 2Plan this room →5,856 sq ft544 m²16 ft4.9 m3006002876507090
Potomac Salon 3Plan this room →6,710 sq ft623 m²16 ft4.9 m3606003007507090
RedBudPlan this room →1,760 sq ft164 m²9 ft2.7 m110120801503030
River Birch APlan this room →1,511 sq ft140 m²10 ft3 m1002001101003036
1 configuration with River Birch A
Combined and divided set-ups that include River Birch A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
River Birch BallroomPlan this room →3,148 sq ft292 m²10 ft3 m2103602102004050
River Birch BPlan this room →1,637 sq ft152 m²10 ft3 m1101401001003036
Rock Creek BallroomPlan this room →10,000 sq ft929 m²16 ft4.9 m6108505251,000——
Rock Creek Salon APlan this room →5,000 sq ft465 m²16 ft4.9 m2003752504505075
1 configuration with Rock Creek Salon A
Combined and divided set-ups that include Rock Creek Salon A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceU-Shape
Rock Creek Salon B&CPlan this room →5,000 sq ft465 m²16 ft4.9 m28047528045080100
Rock Creek Salon BPlan this room →2,500 sq ft232 m²16 ft4.9 m150231922753248
Rock Creek Salon CPlan this room →2,500 sq ft232 m²16 ft4.9 m150231922753248
SycamorePlan this room →300 sq ft28 m²—————10—
Additional spaces (dimensions only) (7)
Additional spaces with published dimensions only at The Westin DC Downtown
SpaceSq ft / m²Ceiling
Anacostia Pre-FunctionPlan this room →4,500 sq ft418 m²9.3 ft2.8 m
Anacostia Registration DeskPlan this room →1 × 1 ft0.3 × 0.3 m1 ft0.3 m
BlossomPlan this room →60 × 44 ft18.3 × 13.4 m9 ft2.7 m
Potomac Ballroom Pre-FunctionPlan this room →8,500 sq ft790 m²9.3 ft2.8 m
Potomac Registration DeskPlan this room →1 × 1 ft0.3 × 0.3 m1 ft0.3 m
Rock Creek Ballroom Pre-FunctionPlan this room →4,600 sq ft427 m²9.3 ft2.8 m
Rock Creek Registration DeskPlan this room →1 × 1 ft0.3 × 0.3 m1 ft0.3 m

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 Washington.

Frequently asked questions

What is the floor plan of The Westin DC Downtown?

The Westin DC Downtown has 36 event rooms and 77,872 sq ft of event space, per the hotel. The largest space is Potomac Ballroom, 19,032 sq ft (156 × 122 ft). Every room's dimensions and seating capacity by setup are listed on this page. The Westin DC Downtown's own floor plans are published on its website, linked from this page.

How many event rooms does The Westin DC Downtown have?

The Westin DC Downtown has 36 event rooms and 77,872 sq ft of event space, per the hotel. 55 configurations are listed on this page.

What is the largest space at The Westin DC Downtown?

Potomac Ballroom, 19,032 sq ft: 156 × 122 ft, 1,200 banquet / 1,800 theater.

How many people can The Westin DC Downtown seat for a banquet?

Up to 1,200 in Potomac Ballroom. The next largest room, Potomac Ballroom Salon 1 & 2, seats 660.

What is the ceiling height at The Westin DC Downtown?

The highest ceiling is 18 ft, in Anacostia Ballroom.

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