Strikeforce was an American mixed martial arts organization. It crowned male champions in the lightweight, welterweight, middleweight, light heavyweight and heavyweight divisions, and female champions in featherweight and bantamweight.

206 pounds (93 kg) to 265 pounds (120 kg)

186 pounds (84 kg) to 205 pounds (93 kg)

171 pounds (78 kg) to 185 pounds (84 kg)

156 pounds (71 kg) to 170 pounds (77 kg)

146 pounds (66 kg) to 155 pounds (70 kg)

136 pounds (62 kg) to 145 pounds (66 kg) Formerly known as the Women's Lightweight Championship and the Women's Middleweight Championship

126 pounds (57 kg) to 135 pounds (61 kg) Formerly known as the Women's Welterweight Championship