Ectoplasm may refer to:
Biology
- Ectoplasm (cell biology), the outer part of the cytoplasm of protists
Art and entertainment
- Ectoplasm (radio show), BBC Radio 4 comedy series
- Ectoplasm (My Hero Academia), a character in the manga series My Hero Academia
Other uses
- Ectoplasm (paranormal), physically sensible phenomenon claimed to be due to "energy" described as paranormal