Elizabeth Ayer (October 13, 1897 – August 4, 1987) is recognized as a pioneering architect in Seattle, Washington, whose professional activities stretched over more than five decades.

The next year she began her long association with Seattle architect Edwin Ivey.

During the 1920s and 1930s, Ayer played key roles in design and supervision of the Ivey's residential commissions.

Ayer took over the firm and with another employee, Rolland Lamping, continued the practice.

[1] In 1942, they suspended the practice—for the duration of World War II Ayer worked as an architect in the U.S.