1999–2000 Segunda Divisão B
| Season | 1999–2000 |
|---|---|
| Champions | FC Marco |
| Promoted | |
| Relegated | 12 teams |
← 1998–99 2000–01 → | |
The 1999–2000 Segunda Divisão season was the 66th season of the competition and the 50th season of recognised third-tier football in Portugal.