Dolores Mary Mertz (née Shay; May 30, 1928 – October 18, 2022) was an American politician from Iowa.

Born in Bancroft, Iowa to John and Gertrude (née Erickson) Shay, she earned her AA from Briar Cliff College (now Briar Cliff University).

[3] She married Pete Mertz in 1951, and following his death in 1983, she was appointed to the Kossuth County Board of Supervisors to fill the remainder of his term.

She also serves on the Agriculture and Natural Resources Appropriations Subcommittee.

[5] In 2012, Governor Terry Branstad appointed Mertz to serve on the Iowa Racing and Gaming Commission.