Lightweight is a weight class in combat sports and rowing.
The lightweight division is over 130 pounds (59 kilograms) and up to 135 pounds (61.2 kilograms) weight class in the sport of boxing. Notable lightweight boxers Alexis Argüello, Henry Armstrong, Ken Buchanan, Tony Canzoneri, Pedro Carrasco, Joel Casamayor, Al "Bummy" Davis, Oscar De La Hoya, Roberto Durán, Artur Grigorian, Joe Gans, Benny Leonard, Ray Mancini, Floyd Mayweather Jr., Juan Manuel Marquez, Sugar Shane Mosley, Miguel Ángel González, Carlos Ortiz, Edwin Valero, Pernell Whitaker, Manny Pacquiao, and Ike Williams.
Artur Grigorian holds the record for most consecutive title defenses at this division, with 17 defenses of the WBO title.
Below is a list of "longest reigning lightweight champions" career time as champion (for multiple time champions) does not apply.
International Kickboxing Federation (IKF) Lightweight (Pro & Amateur) 127.1 lb - 132 lb or 57.77 kg - 60 kg. Women's divisions also use this weight class, but usually at a lower weight than the men's divisions. In Glory promotion, a lightweight division is up to 70 kg (154 lb).
Mixed martial arts
In MMA, the lightweight division is from 146 lb (66 kg) to 155 lb (70 kg).
Lightweight rowing was a category entered into the Olympic sport, originally due to countries of smaller stature competing with an unfair disadvantage, as rowing favors the taller athlete who has more leverage.
Current Olympic class lightweight events in rowing are a men's lightweight Double Scull, and a women's lightweight Double Scull.