| Honorific-Prefix: | The Honorable |
| Arrel Olaño | |
| Office1: | Member of the Philippine House of Representatives from Davao del Norte's 1st district |
| Term Start1: | June 30, 2001 |
| Term End1: | June 30, 2010 |
| Predecessor1: | Pantaleon Alvarez |
| Successor1: | Antonio Rafael Del Rosario |
| Birth Date: | 3 May 1943 |
| Birth Place: | Tagum City, Davao del Norte, Philippines |
| Nationality: | Filipino |
| Party: | Lakas-CMD |
Arrel R. Olaño (born May 3, 1943 in Tagum City, Davao del Norte, Philippines), is a Filipino politician. A member of the LAKAS-CMD Party, he has been elected to three terms as a Member of the House of Representatives of the Philippines, representing the First District of Davao del Norte. First elected in 2001, he was re-elected in 2004 and 2007. Olaño is also a certified public accountant.
In June 2023, Olaño faced legal consequences as he was found guilty by the Sandiganbayan of three counts of graft, three counts of malversation, and one count of direct bribery in connection with the pork barrel scam. Alongside his co-accused, he was accused of diverting his share of the Priority Development Assistance Fund, totaling P1.89 million, P4 million, and P2.5 million, to non-governmental organizations associated with Janet Lim-Napoles for fictitious projects in 2007. The court sentenced him to imprisonment for durations ranging from 6 to 10 years for each graft case, 6 to 12 years for each malversation case, and 4 to 9 years for the direct bribery case.[1] He filed a motion for reconsideration but it was denied by the court in October 2023.[2]