Qwest Tower

Qwest Tower may refer to
 * CenturyLink Tower (formerly Qwest Tower), the tallest building in Sioux Falls and the state of South Dakota
 * Quest Tower, in Phoenix Plaza, 3rd tallest building in Phoenix

or either of the following skyscrapers in Denver, Colorado, USA:


 * 1801 California Street, the former world headquarters of Qwest
 * 555 17th Street, the Qwest headquarters from 1997 to 2000