Delfinen (Swedish for dolphins) may refer to:
, various Swedish Navy ships Swedish Delfinen-class submarine, a Royal Swedish Navy class Danish Delfinen-class submarine, a Royal Danish Navy class , the lead ship of the class, launched in 1956 , a Swedish royal barge constructed in 1787; see List of oldest surviving ships Coop Norrbotten Arena, Luleå, Sweden, an indoor sporting arena originally named Delfinen Delfinen, the student newspaper of Aarhus University, Aarhus, Denmark