Markus Klaer (June 26, 1968 – May 21, 2020) was a German politician and engineer. He was a member of the Christian Democratic Union (CDU). Klaer was in the Abgeordnetenhaus of Berlin, the city's state parliament, from 2011 until 2016. He returned to the Abgeordnetenhaus from August 1, 2019, until his death in May 28, 2020. He was born in Geseke, North Rhine-Westphalia.