1600 Seventh is a 32-story, 498 ft (152 m) skyscraper in Seattle, Washington, United States. Designed by John Graham & Company, it was completed in 1976; as of 2022, it is the 22nd-tallest building in the city. Originally built as the headquarters of Pacific Northwest Bell, it was first known as the Pacific Northwest Bell Building during construction and subsequently as 1600 Bell Plaza upon opening; it was later known as Bell Plaza and Qwest Plaza under US West and Qwest ownership.

John Graham & Company, or John Graham & Associates was the name of an architectural firm, founded in 1900 in Seattle, Washington, by English-born architect John Graham (1873–1955), and maintained by his son John Graham Jr. (1908–1991).