Katalin Ertsey is a Hungarian journalist and politician, member of the National Assembly (MP) from Politics Can Be Different (LMP) National List between 2010 and 2014. She was a member of the Committee on Consumer Protection from May 14, 2010 to February 11, 2013 and from September 23, 2013 to May 5, 2014, and a member of the Committee on Foreign Affairs from March 7, 2011 to May 5, 2014 (as Deputy Chairperson since September 23, 2013).