The official seal of Seattle consists of a portrait of Chief Seattle under which appears the date 1869, the year of the city's incorporation. It is surrounded by two circles. The words CORPORATE SEAL OF THE are at the top within the outer circle, and the words CITY OF SEATTLE are at the top within the inner circle. At the bottom, within the outer circle, are two conifer cones with a dolphin on each end.

Designed by James A. Wehn and cast by Richard Fuller, it was adopted in 1937.