Sælen is a surname of Norwegian origin. Notable people with the surname include:
Frithjof Sælen (disambiguation), multiple people Ivar Bergersen Sælen (1855–1923), Norwegian politician Kjetil Sælen (born 1969), Norwegian football referee Odd Henrik Sælen (1920–2008), Norwegian oceanographer
See also , a submarine used by the Royal Danish Navy Sælen Church, a parish church in Vestland, Norway Saelens, a surname