Eunice Viola "Ola" Babcock Miller (March 1, 1871 – January 25, 1937) was an American politician and the first female Iowa Secretary of State.

"[W]hen Gallup was a professor of Journalism at Northwestern University, his mother-in-law Ola Babcock Miller ran for Lieutenant Governor of Iowa.

Her husband had died in office and the nomination was largely honorary and she was not expected to win.

Gallup decided to apply his ideas about measuring reader interest to understanding her chances.

While secretary of state in 1935, Miller started the Iowa Highway Safety Patrol.