Mark Anthony Miloscia (born September 13, 1958) is an American politician and former Washington State Senator.
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 2012, Miloscia ran as a Democrat for Washington State Auditor; a race which he lost in the primary election.
Miloscia ran again for State Auditor in 2016, this time as a Republican, lost the General Election to Democrat Pat McCarthy by 4 percentage points.
He had represented the 30th Legislative District for seven terms from 1999 to 2013 in the Washington House of Representatives as a Democrat.
He is endorsed by The Seattle Times newspaper for re-election in 2018.