The Manhattan Building, also known as the Phoenix Building or the Phoenix-Manhattan Building, is a historic skyscraper in Muskogee, Oklahoma. The building has eight stories. It was built in 1911 with a reinforced concrete frame and gray brick cladding. It was built in Sullivanesque architectural style, with two story columns flanking the entrance and a second floor cornice with dentils. A rooftop penthouse was added in 1957. The Manhattan Building was added to the National Register of Historic Places for architectural significance in 1983.
It is one of five skyscraper buildings, ranging from five to ten stories tall, built in 1910-1912 and included in the Pre-Depression Muskogee Skyscrapers Thematic Resources study. The others are: