Tomcat may refer to:

Animals

• A male cat

• Paederus, known as in Indonesia

Media

• Tom Cat, a character from the animated series Tom and Jerry

• Tom Cat (album), a 1981 album by Lee Morgan

• Tom Cat (band), a Japanese band who contributed to the Fist of the North Star soundtrack

• Tomcat (comics), DC Comics character, son of Wildcat

• Tomcat (video game), a 1989 computer game published in the UK by Players Software

• Tomcats (1977 film), a 1977 rape-and-revenge film

• Tomcats (2001 film), a 2001 comedy film

• The Tomcats, Brian Setzer's first rockabilly music group

• TomKat, a portmanteau for celebrity couple Tom Cruise and Katie Holmes

• Tomcat (2016 film), a 2016 Austrian film

• Talking Tom, a character in Outfit7's Talking Tom and Friends media franchise

Science and technology

• Apache Tomcat, an implementation of Java web-server technologies

• Beretta 3032 Tomcat, a pistol

• Grumman F-14 Tomcat, a fighter aircraft

• Kawasaki Tomcat ZX-10, a motorcycle

• Rover 200 Coupé, a car

• TOMCAT/SLIMCAT, a chemical transport model

• Waspair HM 81 Tomcat, an ultralight aircraft