John C. Sigler (born 1945) is an American lawyer, gun rights activist, former chair of the Republican State Committee of Delaware and former president of the National Rifle Association (NRA). Sigler graduated from Milford High School in 1964 and attended Appalachian State Teacher's College. He earned a bachelors degree in criminal justice administration from Wilmington College in 1981, a Master of Business Administration from Central Michigan University, and a Juris Doctor from Widener University School of Law in 1987. He served in the United States Navy from 1967 to 1971 on the USS George Bancroft (SSBN-643) and USS Hardhead (SS-365), and worked for the police department in Dover, Delaware from 1972 to 1991. He retired as a captain and subsequently worked as a lawyer.