| 1983–84 Cuban National Series | |
| League: | Cuban National Series |
| Sport: | Baseball |
| No Of Games: | 75 |
| No Of Teams: | 18 |
| Season: | First division |
| Season Champ Name: | Champion |
| Season Champs: | Citricultores (52–23) |
| Season2: | Second division |
| Season Champ2 Name: | Champion |
| Season Champs2: | Forestales (40–35) |
| Seasonslistnames: | SNB |
| Prevseason Link: | 1982–83 Cuban National Series |
| Prevseason Year: | 1982–83 |
| Nextseason Link: | 1984–85 Cuban National Series |
| Nextseason Year: | 1984–85 |
The 23rd Cuban National Series marked the first time the league was divided into two divisions, each consisting of nine teams, after the first half of the season. The 18 teams of the league remained unchanged, but the length of schedule was increased from 51 games to 75 games.
Citricultores, from Matanzas Province, became champion of the first division, and Forestales, from Pinar del Río Province, became champion of the second division.
| Team | W | L | Pct. | GB | |
|---|---|---|---|---|---|
| Citricultores (Matanzas) | 52 | 23 | .693 | - | |
| Industriales (Havana) | 49 | 25 | .662 | 2½ | |
| 48 | 27 | .640 | 4 | ||
| 46 | 27 | .630 | 5 | ||
| 47 | 28 | .626 | 5 | ||
| Vegueros (Pinar del Río) | 44 | 31 | .586 | 8 | |
| Henequeneros (Matanzas) | 36 | 36 | .500 | 14½ | |
| 36 | 39 | .480 | 16 | ||
| 30 | 45 | .400 | 22 |
| Team | W | L | Pct. | GB | |
|---|---|---|---|---|---|
| Forestales (Pinar del Río) | 40 | 35 | .533 | - | |
| 37 | 38 | .493 | 3 | ||
| 34 | 40 | .459 | 5½ | ||
| 34 | 41 | .453 | 6 | ||
| 34 | 41 | .453 | 6 | ||
| Metropolitanos (Havana) | 30 | 43 | .410 | 9 | |
| 28 | 46 | .378 | 11½ | ||
| 25 | 48 | .342 | 14 | ||
| 19 | 56 | .253 | 21 |