PHD or PhD may refer to:
- Doctor of Philosophy (PhD), an academic qualification
Comics[edit]
- PhD: Phantasy Degree, a Korean comic series
- Piled Higher and Deeper or PhD Comics, a webcomic
Music[edit]
- Ph.D. (band), a 1980s British group
- Ph.D. (Art Farmer album)
- "PHD", a song on the album Tweekend by the Crystal Method
Other uses[edit]
- PHD finger, a protein sequence
- Harry Clever Field (IATA and FAA LID: PHD), a US airport
See also[edit]
- EGLN2 or PHD1, an enzyme
- EGLN1 or PHD2, an enzyme
- EGLN3 or PHD3, an enzyme
- Naval Surface Warfare Center Port Hueneme (NSWC PHD), California, US