Zajdel is a Polish-language surname, a Polish phonetic rendering of the surname Seidel.
The surname may refer to:
- Janusz Zajdel (1938–1985), Polish science fiction author, second in popularity in Poland after Stanisław Lem
- Saulie Zajdel, Canadian politician
See also
edit- Janusz A. Zajdel Award, often called just Zajdel, the annual award for Polish science fiction and fantasy