ボストン（アメリカ）の5つ星高級ホテル10選（2026年版）— バックベイ、ウォーターフロント、歴史的名宿

Picture a slim glass tower rising 61 floors, the tallest building in Back Bay, and you've got the Four Seasons Hotel One Dalton Street, Boston, the newest and most expensive Four Seasons in the city. It opened in 2019, taking the lower floors while private residences fill the top. What sells the place is the panoramic view: from the high floors you see the Charles River, the green of Boston Common, and the skyline almost all the way around. All 215 rooms and suites run warm and contemporary, with good materials and big windows. Downstairs, Zuma brings its globally known contemporary Japanese kitchen, and the Wellness Floor stacks a spa, an indoor pool with city views, and a gym that reviewers rate among Boston's best. Add the warm, detail-obsessed Four Seasons service and you reach 9.3/10 — built for couples, luxury travelers, and business guests who want new over historic.

Picture a luxury hotel whose building plugs directly into the Prudential Center mall, so you can walk from the lobby into the shops without stepping outside into a Boston winter even once. That's the Mandarin Oriental, Boston, a Forbes Five-Star address in the heart of Back Bay on Boylston Street. What sets it apart: all 148 rooms and suites are billed as the largest in the neighborhood, finished in warm tones with the Asian-inflected details the brand is known for. The headline everyone talks about is the spa — over 16,000 square feet that many reviews call one of Boston's best, with treatment rooms, a vitality pool and a full relaxation zone. The food is serious too: Ramsay's Kitchen, Gordon Ramsay's first Boston restaurant, plates contemporary British food in an elegant room. Reviewers agree most on the polished, attentive Mandarin-style service. Overall 9.4/10 — built for couples, luxury travelers and business guests who want big rooms, a great spa and indoor shopping.

Picture a stately red-brick building set right on the Boston waterfront, with a huge 60-foot rotunda arch cut through its middle like a doorway that frames the harbor and the boats moored beyond. That's the Boston Harbor Hotel at Rowes Wharf, a Forbes Five-Star and AAA Five-Diamond waterfront hotel open since 1987 and one of the most recognizable shapes on the harbor skyline. What sets it apart is the genuine waterside position: many of the 232 rooms and suites open onto full bay views, with sailboats drifting past and morning light off the water. A water taxi dock sits right out front, so you can reach Logan airport in about 7 minutes by boat instead of fighting tunnel traffic. The kitchen anchor is Rowes Wharf Sea Grille, known for fresh New England seafood and a waterside terrace, with the classic Rowes Wharf Bar alongside. The Financial District, Faneuil Hall, and the New England Aquarium are all an easy walk. Score 9.4/10.

Picture pulling back the curtains to Boston Public Garden — the city's oldest and prettiest park — stretching across your window. That's the draw of the Four Seasons Hotel Boston, the city's first Four Seasons, standing on Boylston Street directly across from the garden since 1985. While the newer One Dalton is the sleek skyscraper sibling, this is the original that long-time Bostonians are attached to, and it has just come through a full building-wide renovation that left the rooms and public spaces fresh and current while keeping the warm classic feel. All 273 rooms and suites wear soft contemporary tones, and many open onto the garden and the old-town skyline. Dining runs through Trifecta and Bar Boylston, while an upper floor holds an indoor garden-view pool and a spa that reviewers praise for how relaxing it is. Add the attentive Four Seasons service and you land at 9.4/10 — a fit for couples, luxury travelers, and anyone who loves classic central Boston.

Picture the legendary Singapore hotel that gave the world the Long Bar and the Singapore Sling more than a century ago — then imagine it opening its first North American outpost in the middle of Boston. That's Raffles Boston, which launched in September 2023 inside a slim high-rise in Back Bay. The part everyone talks about is the Sky Lobby: a 3-storey atrium with a sweeping spiral staircase as its centrepiece and more than 1,000 contemporary artworks scattered through the building. All 147 rooms and suites are warm, contemporary and dressed in good materials, with big windows framing the city. On the food side, Amar serves chef George Mendes's contemporary Portuguese cooking, while the high-floor Long Bar pairs Raffles cocktail history with skyline views. The spa runs a 20-metre indoor pool — genuinely large for a downtown hotel. Reviewers agree most on the butler service: warm, attentive, never stiff. Best for couples and luxury travelers who want a brand-new stay with a real story.

Picture the corner locals will tell you is one of the best addresses in Boston: where the boutiques of Newbury Street meet Arlington Street, with Boston Public Garden sitting right across the road. That is where The Newbury Boston stands — an elegant brick building that opened in 1927 and ran for decades as one of America's first Ritz-Carltons before a full top-to-bottom restoration brought it back under a new name. What people keep talking about is how cleanly the old building's classic bones blend with fresh, contemporary interiors. All 286 rooms and suites lean warm and tailored, and many look straight onto the garden and the city skyline. The headline draw is Contessa, the Italian-Riviera rooftop from New York's Major Food Group, which became one of Boston's hardest tables almost overnight. Reviews agree on the walk-everywhere location, the attentive service, and a quietly luxurious mood. It scores 9.2/10 and suits couples, luxury travelers, and anyone who wants a hotel with a story on the city's top corner.

Picture a cream-stone Beaux-Arts pile that spent decades as the Boston branch of the Federal Reserve Bank before reopening at 250 Franklin Street as a 5-star hotel. That is The Langham, Boston, and a recent multi-million-dollar renovation kept the soaring ceilings, classical stone columns and original painted murals while dropping a fresh, contemporary fit-out on top. The 312 rooms and suites are individually furnished, so the look is warm and current rather than cookie-cutter. Downstairs you get Grana for Italian plates, the much-photographed The Fed bar set inside the bank's old vault, the Chuan spa and an indoor pool for thawing out after a cold Boston day. Walk it from here to the waterfront at Rowes Wharf, to Faneuil Hall Marketplace and across the whole Financial District. Reviewers keep landing on the same three things: the building's story, the design balance and genuinely warm service. Overall 9.3/10, best for couples, story-loving luxury travelers and anyone in town on business.

Picture a luxury hotel planted on Avery Street in downtown Boston's Theater District, where you step out the front door and you're basically standing in Boston Common, the oldest public park in America. That's The Ritz-Carlton, Boston — a property pulled fully up to date by a multi-million-dollar renovation, so everything reads crisp and current rather than dated. All 193 rooms and suites lean warm and understated, with floor-to-ceiling windows framing panoramic city views; many look straight down onto the green of the Common and the skyline beyond. The detail guests rave about: you get full access to the Equinox Sports Club next door, with a pool, group fitness classes, and proper spa treatments — bigger and more complete than a typical in-hotel gym. For food there's Artisan Bistro for all-day casual meals and Avery Bar for an evening cocktail, wrapped in the warm, detail-obsessed service Ritz-Carlton is known for. It scores 9.0/10 and suits couples, luxury travelers, and business guests who want a central, park-side base.

Picture two curved glass towers rising straight off the Fort Point Channel, catching the harbor light all day — that's the InterContinental Boston at 510 Atlantic Avenue, sitting right where the Waterfront meets the Financial District. What sets it apart is that every one of the roughly 424 rooms has floor-to-ceiling windows framing either the bay or the city skyline; wake up and you'll watch boats slide past and morning light hit the water in a way few downtown hotels can match. It also landed #1 Best Hotel in Boston from Condé Nast Traveler in 2025, which says something. On the amenity side you get a 6,000-sq-ft spa, an indoor pool you can soak in even in a New England winter, and three distinct waterfront restaurants — Miel, an all-day French brasserie; RumBa, a rum-and-champagne bar; and Sushi-Teq, which pairs sushi with tequila. South Station is a 5-to-7-minute walk. At 8.9/10 it suits couples, luxury travelers and business guests who want a water view next to the money district.

Picture a cream Beaux-Arts stone pile that has held its corner of Copley Square for over a century - that is the Fairmont Copley Plaza, a Boston landmark open since 1912 and designed by Henry Hardenbergh, the same architect behind The Plaza in New York. Walk into the lobby and you will tip your head back at the gold-painted ceiling, the crystal chandeliers and the marble floors that many locals rate among the most beautiful in the city. The 383 rooms and 17 suites run warm and classic - high ceilings, dark wood, heavy drapes - and lean more grand-mansion than modern-hotel. Eating and drinking centres on OAK Long Bar + Kitchen, a long-standing meeting spot for Bostonians. Trinity Church sits directly across the square, Newbury Street is a 3-5 minute walk, and the MBTA Copley Green Line stop is right at the door. Scores 8.7/10 - best for couples and anyone who loves classic Boston with a deep history.