Frank Madill (November 23, 1852 – October 25, 1895) was an Ontario lawyer and political figure.
Born in Scott Township, Ontario County, Canada West in 1852, he was the son of Henry Madill, an Irish immigrant.
He was elected to the provincial assembly in an 1881 by-election held after Thomas Paxton was appointed sheriff for the county.
In 1886, Madill married Florence Young, the daughter of the reeve of Beaverton.
He ran unsuccessfully for the provincial seat in 1883 but was successful in the federal general election in 1887.