Goodman, an elections lawyer and adviser, plans to leave Feb. 16. He will join the political law group of Wiley Rein in Washington.
"Serving the American people as a commissioner of the Federal Election Commission has been a profound honor," he said in a resignation letter to President Trump.
For years, Goodman has been a tireless voice for First Amendment rights on the internet. He has blocked several flagrant and subtle efforts by FEC Democrats to impose regulations on conservative media, the internet, and major websites like Fox, the Drudge Report, Facebook, and Twitter.
"Since the agency's inception, the Federal Election Commission's unique mandate to respect the core constitutional rights of citizens acting, speaking and associating for democratic purposes has provoked criticism from those who disagree with the balance drawn," he wrote Trump.