The Sultan Dam or Band-e Sultan is a dam located on the Ghazni River in the Ghazni Province of Afghanistan. As of April 2013, the dam is just used for irrigating 15,000 hectares of land. It is believed to have the potential to meet electricity needs of 50,000 families. The dam has importance for residents of Ghazni and neighboring Maidan Wardak province. It is believed to be first built during the Ghaznavids in the 10th century, in memory of SultanMahmud of Ghazni.