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.

[1] In 2016, Miloscia ran for state auditor as a Republican, he lost the general election to Democrat Pat McCarthy by 5 percentage points.

[citation needed] On September 15, 2011, Miloscia announced his candidacy to run as a Democrat to replace retiring Washington State Auditor Brian Sonntag.

[8] Miloscia was not among the top-two vote-getters in Washington's blanket primary system, garnering less than 10% of the vote, and thus did not appear on the November general election ballot.

[citation needed] On March 6, 2014, Miloscia switched to the Republican Party when he announced his candidacy for the State Senate in the 30th Legislative District in 2014 - an election he ultimately won by more than 11 points.