Impact may refer to:
- Impact (typeface) – a sans-serif typeface
- "Impact" or Model Mugging – a form of women's self-defense
- Impact wrench – a power tool
In science:
- Impact force – a high force or shock applied over a short time period
- Impact event – the collision of a meteoroid, asteroid or comet with Earth
- Impact crater – a meteor crater caused by an impact event
- Impact factor – a measure of the importance of a science or social science journal
In computing:
- IMPACT (computer graphics) – a computer graphics architecture for Silicon Graphics computer workstations
- Impact Finite Element Program – an open source finite element program
In sports and entertainment:
- Impact (1949 film) – a film noir starring Brian Donlevy and Ella Raines
- Impact (action entertainment magazine) – a monthly action entertainment magazine
- Impact (comic) – a 1955 EC Comics comic book
- Impact (Image comic) – an Image Comics comic book character
- TNA Impact! – a professional wrestling television program
- Impact (news music) – a television news music package
- Montreal Impact – a soccer team in the North American USL First Division
- Impact Records – an American record label