Hyatt Regency Sydney | 5,719 followers on LinkedIn. Australia's largest premium hotel, offering world-class service, luxe, modern accommodation and flexible event spaces. | Hyatt Regency Sydney is a 5-Star, harbourside retreat in Sydney. Located adjacent to Darling Harbour in Sydney's Central Business District (CBD), Hyatt Regency Sydney is Australia's largest upscale hotel. Boasting 878 rooms, world-class meetings and event facilities and five award-winning bars and restaurants.