Irgens is a Norwegian surname. Notable people with the surname include:

• Åshild Irgens (born 1976), Norwegian illustrator
• Christian Andreas Irgens (1833–1915), Norwegian politician
• Joachim Irgens von Westervick (1611–1675), Dano-Norwegian nobleman
• Johan Irgens-Hansen (1854–1895), Norwegian literary critic, theatre critic and theatre director
• Johannes Irgens (1869–1939), Norwegian barrister, diplomat and politician
• Kjeld Stub Irgens (1879–1963), Norwegian politician during the German occupation of Norway
• Lars Johannes Irgens (1775–1830), Norwegian jurist and politician
• Ludvig Irgens-Jensen (1894–1969), Norwegian twentieth-century composer
• Nils Christian Irgens (1811–1878), Norwegian military officer and politician
• Ole Irgens (bishop) (1724–1803), bishop in the Church of Norway
• Ole Irgens (politician) (1829–1906), Norwegian politician
• Diane Jergens,born Dianne Irgens
• Einar Irgens Gustafson (born 1973), Counselor for Norwegian Defense Industry

• Irgens Estate, a private estate in Norway