Victor Marrero (1942-) is a United States federal judge appointed to the United States District Court for the Southern District of New York by President Bill Clinton in 1999. He is well-known for twice striking down elements of the USA PATRIOT Act, most recently in September 2007, stating that the provision in question "offends the fundamental constitutional principles of checks and balances and separation of powers."

Born in 1942 in Santurce, Puerto Rico, Judge Marrero previously served as US Permanent Representative to the Organization of American States (OAS) from 1998-1999 and as US Ambassador to the UN Economic and Social Council (ECOSOC) from 1993-1997. He was a co-founder of the Puerto Rican Legal Defense and Education Fund in 1972.