Dionisio R. Santiago is a Filipino retired Army General and a public servant who served in various military and civilian positions.

He is a former Chief of Staff of the Armed Forces of the Philippines and was appointed chair of Dangerous Drugs Board in July 2017.

[3] As a retired general, Santiago supported Rodrigo Duterte's candidacy for president in the 2016 election and Sara Duterte's candidacy for vice president in the 2022 election.

By 2024, however, Santiago expressed regret in voting for vice president Duterte after she issued assassination threats against president Bongbong Marcos, his wife Liza and House Speaker Martin Romualdez in November.

This article about a Filipino politician is a stub.