Delta Tau Delta (ΔΤΔ), commonly known as Delt or DTD, is a United States-based international Greek letter college fraternity. Delta Tau Delta was founded in 1858 at Bethany College, Bethany, Virginia, (now West Virginia). It currently has around 140 student chapters nationwide, as well as few regional alumni groups. Its national philanthropic partner is the diabetes research organization JDRF.