Sanjagan (Persian: سنجگان‎‎, also Romanized as Sanjagān, Sanjegān, Sanjgān, Senjegān, Senjgān, and Sīnjgān) is a village in Rahjerd-e Sharqi Rural District, Salafchegan District, Qom County, Qom Province, Iran. At the 2006 census, its population was 336, in 119 families.This village is known for its dam and historical area.