| Club: | CD Leganés |
| Season: | 1999–2000 |
| Manager: | José Antonio Fernández González (until 2 October) Cortijo (caretaker, 2 to 10 October) Enrique Martín (from 11 October) |
| League: | Segunda División |
| League Result: | 13th |
| Cup1: | Copa del Rey |
| Cup1 Result: | First round |
| League Topscorer: | Sergio Pachón (12) |
| Season Topscorer: | Sergio Pachón (12) |
| Prevseason: | 1998–99 |
| Nextseason: | 2000–01 |
The 1999–2000 season was the 72nd season in the existence of CD Leganés and the club's seventh consecutive season in the second division of Spanish football. The season covered the period from 1 July 1999 to 30 June 2000.
See main article: 1999–2000 Segunda División.
Source: [1]
See main article: 1999–2000 Copa del Rey.