Samuel Reyes Martires (Tagalog: [sɐmˈwɛl ˈrɛjɛs ˌmaːɾtɪˈrɛs]; born January 2, 1949) is a Filipino lawyer serving as the Ombudsman of the Philippines since 2018.

He then earned his Bachelor of Laws from San Beda College in 1975 and passed the bar exam the following year, becoming the first lawyer in his family.

After the 1986 People Power Revolution, he received an offer to become a judge, which he declined, citing the low salary and their ill reputation of being corrupt.

Martires allegedly refused to issue a warrant of arrest for a murder suspect despite the presence of evidence and the urgings of the prosecution.

[11] In his Supreme Court decision acquitting two men of rape in 2018 (concurred by Associate Justices Presbitero Velasco Jr., Lucas Bersamin, Marvic Leonen, and Alexander Gesmundo), Martires rejected the application of the decades-long María Clara doctrine in trial courts' decision of rape cases, saying that it "borders on the fallacy of non-sequitur" and that doing so would put the accused "at an unfair disadvantage" and bring forth a "travesty of justice".

Martires argued that the doctrine has become obsolete, as women over the years have become less reluctant to disclose sexual abuse committed against them.

[15] In 2019, media outlets reported that Martires' Statement of Assets, Liabilities and Net Worth (SALN) reflected an increase of PHP15 million over a 5-month period.

Under the new guidelines, the people who can request copies of SALNs are the public officials who filed them or their representatives, a court as part of a case, and the Ombudsman's field investigators.

[27] His predecessor Conchita Carpio-Morales criticized his proposal, arguing that it will "open floodgates to the commission of more corrupt activities.