Finsen may refer to:
People Lawrence Finsen, American ethicist Niels Ryberg Finsen (1860–1904), Faroese-Icelandic physician and scientist Susan Finsen, American ethicist William Stephen Finsen (1905–1979), South African astronomer
Other uses Finsen (crater), on the Moon Finsen Laboratory, in Copenhagen 1794 Finsen, a minor planet