Oscar Muñoz Orbos (born January 28, 1951), popularly known as Ka Oca, is a Philippine TV personality and host of GMA Network's Debate with Mare at Pare.

He became a legal assistant to the Paredes, Poblador, Nazareno, Azada and Tomacruz Law Firm from 1975 to 1976 and elevated to Associate Attorney in 1976.

He co-hosted GMA Network's Firing Line, a TV panel talk show with Teodoro Benigno, Mrs. Aquino's former press secretary.

In 2024, President Bongbong Marcos appointed him as the acting chairperson and member of the Board of Directors of the People's Television Network, Inc.

[4] In late 1998, Orbos was offered by Menardo Jimenez, president of GMA Network to host an open debate program for TV.

As a good friend, he gladly accepted the offer and was paired with Economics professor Solita Monsod, known as "Mareng Winnie."

Jerry Orbos, SVD, is a popular Catholic priest who regularly appears on Sunday TV healing Masses.

His other brother, Thomas Orbos served as the acting chairman and General Manager of the Metropolitan Manila Development Authority.