| Competition: | Segunda Divisão |
| Season: | 1989–90 |
| Winners: | SC Salgueiros |
| Promoted: | SC Salgueiros Gil Vicente FC SC Farense |
| Prevseason: | 1988–89 |
| Nextseason: | 1990–91 (2DH) 1990–91 (2DB) |
The 1989–90 Segunda Divisão season was the 56th season of recognised second-tier football in Portugal. It was the last regionalized contest for the second tier championship, as a new Segunda Liga took shape as an unified second tier from the next season onwards.[1]
The league was contested by 54 teams in 3 divisions with SC Salgueiros, Gil Vicente FC and SC Farense winning the respective divisional competitions and gaining promotion to the Primeira Liga. The overall championship was won by SC Salgueiros.[1]
The last 4 classified in each series competed for against the teams classified in 6th place in each of the 6 series of the III Divisão and the 2 best 7th classified of the 6 series of the III Divisão (CD Fátima and Moura), in one hand. The 10 winners qualified for 1990–91 Segunda Divisão B, while the losers competed in 1990–91 Terceira Divisão.[2]
| Home | Score | Away | |
|---|---|---|---|
| Peniche | 0–2 | Leça | |
| Samora Correia | 1-3 | Sintrense | |
| Torres Novas | 1-2 | CD Lousanense | |
| Moura AC | 0-2 | Marco | |
| Portalegrense | 0-1 | Trofense | |
| Loures | 2-0 | Almansilense | |
| Amadores de Caminha | 0-5 | Oliveirense | |
| Vizela | 2-0 | CD Fátima | |
| União de Coimbra | 1-1 (3-1 g.p.) | Vianense | |
| Oliveira Bairro | 1-2 a.p. | Olivais e Moscavide |