Hermilando Ingco Mandanas (born March 25, 1944), colloquially nicknamed as Dodo, is a Filipino politician who has served as Governor of Batangas since 2016.

He finished his Bachelor of Science in Commerce degree as consistent dean's lister – first honor at De La Salle College in 1963.

[1] He also served as chairman of Department of Accountancy (1968–1969), associate dean of School of Commerce (1967–1969) and a member of the board of trustees (1979–1985) in the De La Salle University.

From 2004 to 2013, he served as the representative for 2nd district of Batangas, holding positions such as former chairman of the Ways and Means Committee, vice-chairperson for Economic Affairs, and member for the majority in various committees including Banks and Financial Intermediaries, Bases Conversion, East ASEAN Growth Area, Energy, Foreign Affairs, Globalization and WTO, Government Enterprises and Privatization, Millennium Development Goals, National Defense and Security, and Trade and Industry.

During his tenure, he and Bataan Governor Enrique Garcia Jr. petitioned the Supreme Court of the Philippines for a higher share of national internal revenue taxes for local government units, leading to the Mandanas-Garcia Ruling, named after them.