Yes, girls and women have groin muscles. The groin is actually a group of five muscles that attach the thigh to the pelvis, and everyone has these muscles. They are also called the "adductors."
A groin pull or strain occurs when too much stress is placed on the muscles in the groin region. According to WebMD, these injuries are divided into three degrees, based on severity, with a third-degree pull being the worst. Groin injuries take approximately four to six weeks to heal and do not usually require surgery. The recommended treatment is icing, compression and anti-inflammatory medications, such as ibuprofen.