Only One may refer to:
- Music
- Only One, debut mini album by Bang Ye Dam
- Only One, seventh full-length album by BoA
- "Only One", 33rd Japanese single by BoA
- "Only One", sixth Japanese digital single by BEAST
- "Only One", first digital single by JBJ95
- Only One, third full-length album by SHINHWA
- "Only One", digital single by Solji and Hani
- "Only One", second English digital single by VCHA