The Strikeforce Lightweight Championship was a title in the Strikeforce mixed martial arts organization, specifically for fighters competing in the lightweight division, which includes competitors weighing up to 155 pounds. Established in 2006, the championship showcased some of the best talent in the sport and was known for its exciting matchups. The title was held by several notable fighters, including Gilbert Melendez and Josh Thomson. The championship was unified with the UFC Lightweight Championship when the UFC acquired Strikeforce in 2011, leading to the eventual discontinuation of the Strikeforce title.