| U23 Liège–Bastogne–Liège | |
| Date: | Late-April |
| Region: | Wallonia, Belgium |
| English: | Liège–Bastogne–Liège |
| Discipline: | Road |
| Competition: | UCI Europe Tour |
| Type: | Single-day |
| Number: | 38 (as of 2024) |
| Mostwins: | (2 wins) |
The U23 Liège–Bastogne–Liège or Liège–Bastogne–Liège Espoirs is a cycling race in Belgium, held eight days before the cycling classic, the Liège–Bastogne–Liège. This amateur version of the race began in 1986, and since 2005, it has been open to professionals under the age of 23.