PEG may stand for:
- Fixed exchange rate, viz pegged exchange rate or currency peg
- Parsing Expression Grammar
- PEG ratio, the ratio of (price/earnings)/growth, which is used in evaluating the prospect of a specific share
- Percutaneous endoscopic gastrostomy
- Polyethylene glycol
- the Program for the Exceptionally Gifted, a residental early college entrance program at Mary Baldwin College
- Public, educational, and government access television