The Inn at Diamond Cove offers a peaceful island escape where guests can relax, recharge, and experience the quiet beauty of the Maine coast. Originally constructed in the 1890s as part of Fort McKinley, the property once played a vital role in the nation’s coastal defense system, protecting Portland Harbor and Casco Bay. Today, the Inn is thoughtfully housed within the former military barracks, overlooking the historic parade grounds and blending rich history with modern comfort. With no cars permitted on Great Diamond Island, the setting feels calm, scenic, and wonderfully removed from the pace of everyday life.

Guests of the Inn enjoy beautifully appointed accommodations, including luxury condo-style suites with private balconies, expansive wooden porches, a swimming pool, cabana bar, and waterfront dining at Diamond’s Edge Restaurant & Marina overlooking Casco Bay. The atmosphere is relaxed yet refined, offering an experience that feels both secluded and welcoming.

With 44 guest rooms and spacious condominium-style suites, Inn at Diamond Cove also provides a rare opportunity for full property buyouts. Reserving the entire Inn transforms the destination into a private coastal retreat exclusively for your group, where every guest room, gathering space, and outdoor venue is yours to enjoy. Whether hosting a wedding weekend, milestone celebration, family reunion, or corporate retreat, a full buyout creates a seamless multi-day experience surrounded by the natural beauty, history, and quiet charm of Great Diamond Island.