Marcelino "Marcy" Reyes Teodoro (born August 2, 1970) is a Filipino politician who has served as the representative for Marikina's first district since 2025. A member of the National Unity Party, he previously held the seat from 2007 to 2016 and served as the mayor of Marikina from 2016 to 2025.

Educated at the University of the Philippines Diliman, Teodoro entered politics in 1992 after being elected to the Marikina Municipal Council (later the Marikina City Council). He first became a member of the House of Representatives of the Philippines in 2007 and served until 2016, when he ran for mayor of Marikina and defeated incumbent mayor Del de Guzman. During his mayoralty, he oversaw the local government's response to the COVID-19 pandemic and the aftermath of Typhoon Ulysses, both of which were received favorably in the media.

In March 2025, during his final term, the Office of the Ombudsman suspended Teodoro and members of his administration for six months in response to allegations of misusing PhilHealth funds. Although he later won a decisive victory in that year's congressional election, his proclamation remained suspended until the Commission on Elections reversed a division's earlier decision to cancel his candidacy over a residency dispute.

Teodoro was born on August 2, 1970, in Santa Elena, Marikina, to Amado Teodoro, a government official, and Lydia Reyes, a teacher. Owing to the occupations of his parents, he spent most his childhood with his maternal grandparents. He attended San Roque Elementary School and graduated as valedictorian in 1982. He later completed his secondary education at the Marikina Institute of Science and Technology (now Marikina Science High School) as salutatorian in 1986.

In 1990, Teodoro graduated with a degree in philosophy at the University of the Philippines Diliman (UP). The following semester after his graduation, he decided to delay law school to teach logic and social philosophy at UP Diliman. He graduate studies at the Ateneo de Manila University under to pursue a Master of Arts in teaching philosophy wherein he got a certificate course in 1997. In 2000, Teodoro and writer Michael M. Coroza, his UP batchmate, established the short-lived publishing company Talingdao Publishing House.

Teodoro was elected as a member of the Marikina Municipal Council in 1992 at the age of 21 as an independent. That year, the Marikina Valley Heritage Foundation awarded Teodoro the "Katibayan ng Tanging Pagkilala" (lit. 'Testimonial of distinguished recognition').

In 1993, Teodoro sought to halt the logging reportedly being done for a realty firm in the mountains of neighboring San Mateo, Rizal, as he expressed fears that it could lead to flash floods in Marikina. In the same year, Teodoro defended Mayor Bayani Fernando from comments made by Representative Romeo Candazo and other opposition councilors alleging that the newly established municipal radio station (DWPM) was operated illegally, arguing that President Fidel V. Ramos had personally approved of its creation.

In 1998, the Roosevelt College System awarded him the "Testimonial of Distinguished Service".