The Westin Washington National Harbor — Event Spaces, Floor Plans & Capacities

171 Waterfront St, Oxon Hill, MD 20745

6 rooms · largest space: Potomac Conference Room, 1,860 sq ft173 m²

The Westin Washington National Harbor in Oxon Hill offers 6 event rooms. The largest space is Potomac Conference Room, 1,860 sq ft173 m². It holds up to 150 guests. Explore the floor plans and capacity charts below, or start arranging your own layout in the free planner.

Plan an event in Potomac Conference Room: open a free to-scale layout seating 80 at round tables in its 30 × 62 ft footprint at floors.live/start — no account needed.

Across its 6 rooms, The Westin Washington National Harbor handles theater-style sessions for up to 120, seated banquets for 100 and standing receptions for 150. One smaller room suits 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 Washington National Harbor’s published information. Venue staff can verify capacities and setups free: floors.live/venues/us/maryland/oxon-hill/the-westin-washington-national-harbor/?claim=1.

Floor plans

Detailed floor plans for The Westin Washington National Harbor 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

6 rooms

Room capacities and dimensions for The Westin Washington National Harbor
Space	Sq ft / m²	Ceiling	Banquet	Theater	Classroom	Reception	Conference	U-Shape
BoardroomPlan this room →	352 sq ft33 m²	14 ft4.3 m	16	20	18	20	12	12
Harbor TrailPlan this room →	—	—	50	—	—	100	—	—
Potomac APlan this room →	810 sq ft75 m²	14 ft4.3 m	32	60	40	80	20	20
Potomac BPlan this room →	1,050 sq ft98 m²	14 ft4.3 m	64	80	60	100	26	25
Potomac Conference RoomPlan this room →	1,860 sq ft173 m²	14 ft4.3 m	100	120	80	150	48	40

Additional spaces (dimensions only) (1)

Additional spaces with published dimensions only at The Westin Washington National Harbor
Space	Sq ft / m²	Ceiling
Pre-FunctionPlan this room →	1,752 sq ft163 m²	—

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.

Frequently asked questions

What is the floor plan of The Westin Washington National Harbor?

The Westin Washington National Harbor has 6 rooms. The largest space is Potomac Conference Room, 1,860 sq ft (30 × 62 ft). Every room's dimensions and seating capacity by setup are listed on this page. The Westin Washington National Harbor's own floor plans are published on its website, linked from this page.

How many event rooms does The Westin Washington National Harbor have?

The Westin Washington National Harbor has 6 rooms.

What is the largest space at The Westin Washington National Harbor?

Potomac Conference Room, 1,860 sq ft: 30 × 62 ft, 100 banquet / 120 theater.

How many people can The Westin Washington National Harbor seat for a banquet?

Up to 100 in Potomac Conference Room. The next largest room, Potomac B, seats 64.

What is the ceiling height at The Westin Washington National Harbor?

The highest ceiling is 14 ft, in Boardroom.

More event venues near Oxon Hill

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