THR/Thr can mean one of the following:
- Tim Harvey, Tim Harvey Racing - the business of racing driver Tim Harvey
- Threonine, one of the 20 standard amino acids
- Time Highway Radio, the former name of THR.FM, a private radio station in Malaysia
- Target Heart Rate
- Mehrabad Airport, Tehran, Iran
- Total Hip Replacement operation
- Through Hole Reflow (or "pin and paste" or "paste in hole"): process of mounting through hole electronic components using the reflow process
- The Hollywood Reporter, a trade publication of the U.S. entertainment industry
- Tony Hawk: Ride, a skateboarding video game.
- Team Columbia Highroad, the UCI code for the professional road bicycle racing team
- Times Herald-Record, a newspaper in upstate New York