Daniel Fry Miller (October 4, 1814 – December 9, 1895), a pioneer lawyer, was briefly a U.S. Representative from Iowa's 1st congressional district.

He is the only person in Iowa history to successfully nullify a congressional election (and thereby force a re-vote, which he won but with little time left in the term).

[1] In 1848, the Whig Party nominated Miller to run against incumbent Democratic Congressman William H. Thompson.

The U.S. House resolved the contest over two years after it occurred, by deciding that neither Thompson nor Miller was entitled to the seat.

He served as mayor of Fort Madison in 1859, before moving to nearby Keokuk, Iowa, where he continued the practice of law.