Atlantis Banquets & Events

431 East Main Street, Riverhead, NY
650 Capacity
Atlantis Banquets & Events offers one of Long Island’s most unique and versatile collections of event spaces, set along the beautiful Peconic River in Downtown Riverhead. From an elegant ballroom and scenic waterfront pavilion to immersive aquarium settings and flexible meeting rooms, the property provides unforgettable backdrops for weddings, milestone celebrations, proms, galas, fundraisers, corporate functions, and multi-day retreats. Guests enjoy exceptional service, customizable event setups, in-house catering, and stunning waterfront views throughout the property. Whether you’re planning an intimate gathering or a large-scale affair, Atlantis Banquets & Events accommodates a wide range of group sizes with style and sophistication. Conveniently located near the Hamptons and Long Island Wine Country—and steps from two on-property hotels—Atlantis Banquets & Events delivers ease, beauty, and flexibility for every occasion. With dedicated event professionals and a variety of signature spaces, it’s the perfect destination for events that are both seamless and spectacular.

Event Spaces

Coliseum Room
Coliseum Room
General Event Space
320 Capacity
Riverfront Room
Riverfront Room
General Event Space
240 Capacity
Sea Star Ballroom
Sea Star Ballroom
Ballroom
650 Capacity
Shark Room
Shark Room
General Event Space
200 Capacity
The Terrace
The Terrace
General Event Space
100 Capacity
Additional Event Spaces
Additional Event Spaces
General Event Space

Additional Info

Venue Types
Amenities
  • ADA/ACA Accessible
  • Full Bar/Lounge
  • Fully Equipped Kitchen
  • Indoor Pool
  • On-Site Catering Service
  • Outdoor Function Area
  • Outdoor Pool
  • Valet Parking
  • Waterfront
  • Waterview
  • Wireless Internet/Wi-Fi
Features
  • Max Number of People for an Event: 650
  • Number of Event/Function Spaces: 11
  • Special Features: Waterfront location w/ stunning river views • Indoor & outdoor venues • Onsite hotels for easy overnights • Customizable layouts, full catering & planning • Part of the LIAquarium campus • Minutes from the Hamptons & North Fork Wine Trail • On-site marina
  • Year Renovated: 2024