CTW may refer to:
- Sesame Workshop, formerly known as the Children's Television Workshop (or CTW)
- CTW, the ICAO airline designator for Cargo Three, Panama
- context tree weighting (CTW), a lossless compression and prediction algorithm
- Celcius Training Weapon, airsoft gun
- Change to Win Federation, a group of United States labor unions
- CentralWorld, a shopping mall complex in Thailand
- ctw - TOTAL CARAT WEIGHT. Related to diamond jewellery
- Computer Technology Workshop activity at the Joint Statistical Meetings