Ljiljana Zelen Karadžić (born 1945), the wife of the former Bosnian Serb leader Radovan Karadžić
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Zelen's design, experimental design for randomized clinical trials proposed by statistician Marvin Zelen
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Zelen Breg, dispersed settlement in the Carinthia region in northern Slovenia
Before and after publication of Zelen's results astronomer and charter CSICOP member Dennis Rawlins, the CSICOP Council's only astronomer at the time, repeatedly objected to the procedure and to CSICOP's subsequent reportage of it.