Nelson Castro (born January 25, 1972) is an American politician from the state of New York. A Democrat, he was first elected to the New York State Assembly in District 86 in 2008. Castro resigned from office in 2013 after pleading guilty to perjury charges. He is notable for having worn a wire as an FBI informant while serving in elected office; in so doing, he assisted the federal government in prosecuting other corrupt elected officials.