John C. "Jack" Lawn (born June 2, 1935) served as Administrator of the Drug Enforcement Administration (DEA) between 26 July 1985 and 23 March 1990. On 1 March 1985, Lawn, who had served as Deputy Administrator since 1982, was designated Acting Administrator following the retirement of Francis M. Mullen. On 4 April 1985, he was nominated by President Ronald Reagan to be the next Administrator of the DEA. Mr. Lawn was confirmed by the U.S. Senate on 16 July 1985, and sworn in on 26 July 1985.