Killdozer may refer to:
- "Killdozer!" (story), a 1944 novella by Theodore Sturgeon
- Killdozer! (film), a 1974 ABC cult classic sci-fi film based on the Theodore Sturgeon story (also see Cat D9, the star of the story)
- Killdozer (band), a 1980s and '90s U.S. noise rock band
- Killdozer, nickname given to a modified bulldozer used in a 2004 rampage by Marvin Heemeyer