Mark Anthony Miloscia (born September 13, 1958) is an American politician and former public school teacher who served in the Washington State Senate from 2015 to 2019. A Democrat for more than twenty years, in 2014 he switched to the Republican Party and ran for election to represent the 30th Legislative District in the state senate - winning by more than ten percentage points. In 2016, Miloscia ran for state auditor as a Republican, he lost the general election to Democrat Pat McCarthy by 5 percentage points. He represented the 30th legislative district for seven terms, from 1999 to 2013, in the Washington House of Representatives. He was endorsed by The Seattle Times newspaper for re-election in 2018.