Oscar "Oca" Seriña Moreno (born February 28, 1951) is a Filipino politician who served as the mayor of Cagayan de Oro, Philippines, the provincial capital of Misamis Oriental, from 2013 to 2022.

Prioritizing infrastructure in his development agenda was a key element in Moreno's opening of sitio (Spanish for site) Lantad in Barangay (village) Kibanban in Balingasag town, Misamis Oriental.

Months after he assumed office in 2004, then governor Moreno ordered the building of roads that would open access to and from Lantad and ensured the delivery of basic services to its residents who are mostly farmers.

Midway through his first term in the Capitol, Moreno was instrumental in kick-starting the implementation and shepherding the completion of the long delayed Laguindingan Airport project in 2006.

As governor, Moreno facilitated and fast-tracked dialogue between government agencies and the affected homeowners for the land acquisition component of the airport project.

The eventual transfer of the airport from its former site in the hinterland barangay (village) of Lumbia in Cagayan de Oro and completion of the Laguindingan Airport project occurred in April 2013 during campaign season when Moreno ran and won Cagayan de Oro's mayoral seat from Vicente Emano, a former Misamis Oriental governor.

He then became Associate Director of the Strategic Planning Group of Ayala Corp. and Vice President and Chief Legal Counsel of BPI Capital Corp.

He is married to Arlene Parado Pasion from Laoag City and Dingras, Ilocos Norte with whom he has three children – Sean Oliver, Imee Rose and Oscar Jr.