WFF may refer to:
- Wallops Flight Facility - a NASA facility located on the Eastern Shore of Virginia, primary use is a rocket launch site to support science and exploration missions for NASA and other federal agencies
- well-formed formula - in logic, linguistics, and computer science, a symbol or string of symbols that is generated by the formal grammar of a formal language
- WFF 'N PROOF - a game developed to teach principles of logic through well-formed formulas
- Montreal World Film Festival - one of Canada's oldest international film festivals
- Winchester Film Festival - in Hampshire, UK, a free public event which takes place over three days in October each year
- Woodhull Freedom Foundation & Federation, a nonprofit created "to affirm sexual freedom as a fundamental human right"