Forbush can refer to:
- Fictional characters
- Forbush Man, a character in the comic book Not Brand Echh
- Nellie Forbush, a character in the musical South Pacific
- People
- Scott Forbush (1904–1984), astronomer
- Edward Howe Forbush, ornithologist and author of Birds of New England
- Places
- Forbush Township, Yadkin County, North Carolina, USA
- Forbush, North Carolina, a community within Forbush Township
- Forbush Lake on Vancouver Island
- Other
- Forbush decrease, in astronomy, a decrease in observed cosmic ray intensity