Isaac Mekler Neiman (born 9 July 1959) is a Peruvian politician and a former Congressman representing the Constitutional Province of Callao for the 2006–2011 term. Originally from the Peruvian Nationalist Party, Mekler switched to the National Solidarity Party of Luis Castañeda in 2009. In the 2011 elections, he lost his seat he ran for re-election under the National Solidarity Alliance of former Lima Mayor Luis Castañeda but he was not re-elected. He was the leader of the Association of Jews in Peru as of December 2005.