Francisco Alfafara Nemenzo Jr. is a Filipino political scientist, educator, and activist who served as the 18th president of the University of the Philippines (UP) from 1999 to 2005. He had previously served as chancellor of UP Visayas, UP Faculty Regent, and dean of the College of Arts & Sciences of UP Diliman. A prominent Marxist figure in the Philippine academe, he is a professor emeritus of political science at UP Diliman and continues to teach courses in political philosophy and Philippine government.