Grendel, the antagonist in the Anglo-Saxon epic poem Beowulf

"Grendel", a song by Marillion, B side to their first single, "Market Square Heroes" (1982). The recorded version of the song is 17:40 long, while the live versions regularly ran to over 20 minutes.

Grendel, The Holy City in the Scrapped Princess anime

Grendels, a predatory alien species in the science-fiction novel The Legacy of Heorot

6.5 Grendel, a rifle cartridge developed by Alexander Arms

In the 1998 computer game Battlezone, Grendel is the NSDF designation given to the Soviet bomber class ship.

Mozilla Grendel, a Java-based e-mail and Usenet client

Grendel (novel), a novel by John Gardner that retells Beowulf from Grendel's point of view.

Grendel (film), a made-for-television motion picture adaptation of the Beowulf poem and Grendel novel, produced by the Sci Fi Channel.

Grendel: an opera composed by Elliot Goldenthal and directed by Julie Taymor.

"Grendel", a song on the album Diary by Sunny Day Real Estate

"Grendel", a short story by Larry Niven written in 1968.

Grendel (comics), a fictional assassin appearing in comic books by Matt Wagner

Grendel (radio personality), a former radio DJ on KSCU 103.3 FM who won Best DJ in Metro Silicon Valley's 2001 Best of Silicon Valley and Best Celebrity in Metro Silicon Valley's Best of Silicon Valley 2002

Grendel (band), a Netherlands-based dark electro/hard EBM band