The Atrium On Third

The Atrium on Third is a full-service conference and banquet center located at 201 South 3rd Street in Quincy, Illinois, offering 17,500 square feet of event space across six distinct rooms. The centerpiece is the Grand Ballroom, a 4,512-square-foot space with 12-foot ceilings and antique chandelier lighting that accommodates up to 400 guests for banquets and 350 for receptions. For smaller gatherings, the ballroom divides into three separate rooms — Dogwood, Bluffs, and Bayview — each with the same soaring ceilings and a neutral palette designed to complement any décor or theme. Beyond the ballroom, the venue includes the Splash Atrium Lounge, an adjacent space well suited for cocktail hours, rehearsal dinners, and morning brunches. An Executive Conference Room rounds out the offerings for corporate meetings and professional events. The Atrium on Third provides in-house catering with gourmet menu options, bartender service, screen and projector setups, and full event coordination including custom floor plans, setup, and breakdown. Discounted room rates are available for out-of-town guests staying in the attached hotel, making it a practical choice for multi-day celebrations.