3300 North Central Avenue (also known as 3300 Tower) is a high-rise located along Central Avenue in Uptown Phoenix, Arizona, United States. The tower rises 27 floors and 356 feet (109 m) in height. Designed by Skidmore, Owings and Merrill, 3300 North Central Avenue was built in 1980. Upon completion, it stood as the fourth-tallest building in Phoenix and the tallest building outside of Downtown Phoenix. It was built as the headquarters of United Bank of Arizona (later purchased by Citibank, then Norwest). Today, it stands as the 12th-tallest building in the city. It is currently the headquarters of the Arizona State Retirement System.