Mad Bull 34 (マッド★ブル34, Maddo Buru Sanjūyon^?) is a manga series written by Kazuo Koike and illustrated by Noriyoshi Inoue, serialized in Shueisha's Young Jump between 1986 and 1990 and collected in 27 volumes. The series follows the toughest cop in the NYPD's 34th precinct, Mad Bull, and his often-violent exploits when dealing the city's criminals.
Mad Bull was adapted into a four part original video animation released from December 21, 1990 to August 21, 1992. A sequel manga, Mad Bull 2000 (マッド・ブル 2000^?) began in 1999.