The Westin DC Downtown — Event Spaces & Capacities

999 9th St NW, Washington, DC 20001

The Westin DC Downtown gives Washington event planners 55 spaces to work with across 164,453 sq ft15,278 m² of function space. The largest room, Potomac Ballroom, hosts up to 2,500 guests. Review the layouts and seating capacities below, then test your setup in 3D — free.

Plan your event in this space — free

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

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Room capacities & dimensions

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
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
Magnolia BPlan this room →1,237 sq ft115 m²9.5 ft2.9 m506050702012
Magnolia BallroomPlan this room →3,658 sq ft340 m²9.5 ft2.9 m180——200——
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 1Plan this room →324 sq ft30 m²10 ft3 m1020152012—
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——
Potomac Ballroom 2 & 3Plan this room →12,322 sq ft1,145 m²16 ft4.9 m6601,2005871,40094120
Potomac Ballroom Salon 1 & 2Plan this room →12,322 sq ft1,145 m²16 ft4.9 m6601,2405871,35088120
Potomac Salon 1Plan this room →6,466 sq ft601 m²16 ft4.9 m3606403007007090
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
River Birch BPlan this room →1,637 sq ft152 m²10 ft3 m1101401001003036
River Birch BallroomPlan this room →3,148 sq ft292 m²10 ft3 m2103602102004050
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
Rock Creek Salon BPlan this room →2,500 sq ft232 m²16 ft4.9 m150231922753248
Rock Creek Salon B&CPlan this room →5,000 sq ft465 m²16 ft4.9 m28047528045080100
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.