Shirdel Sadak (Persian: شيردل سادك, also Romanized as Shīrdel Sādak; also known as Deh-e Shīrdel, Shāh Moḩammad, and Shīrdel) is a village in Margan Rural District, in the Central District of Hirmand County, Sistan and Baluchestan Province, Iran. At the 2006 census, its population was 130, in 32 families.