Pastor Humberto Lay Sun (Chinese: 黎孙; pinyin: Lí Sūn; born 25 September 1934) is a Peruvian evangelical minister, architect, and politician belonging to the National Restoration Party.

He was also a commissioner on the Truth and Reconciliation Commission that investigated abuses by the Shining Path, Túpac Amaru Revolutionary Movement, and the Military of Peru during the 1980s and 1990s.

In November 2005, Lay founded the National Restoration party, a rally of socially conservative evangelicals, which he has chaired ever since until he resigned in May 2019.

He also ran for Mayor of Lima in the 2006, 2010 and 2018 municipal elections but lost to Luis Castañeda, Susana Villarán and Jorge Muñoz respectively.

For the 2016 general elections, Lay ran for Second Vice President under the Alliance for Progress of Peru coalition in which his National Restoration integrated.