| Season: | 2008–09 |
| Winners: | Apertura: Comunicaciones (22nd title) Clausura: Jalapa (2nd title) |
| League Topscorer: | Apertura: Adrián Apellaniz (10) Clausura: Carlos González (10) Season: Carlos Castillo (16) |
| Nextseason: | 2009–10 |
The 2008–09 Guatemalan Liga Nacional season was the 10th season in which the Apertura and Clausura format was used.
The season was divided into two tournaments; the Apertura, which is played from August to December, and the Clausura, which is played from January to May. The first six clubs in the standings at the end of each competition participate in the playoffs (a two-leg knock-out phase) to determine the champion; the first and second place teams qualify directly to the semi-finals, while the other two have to play in the quarter-finals. The winners of the Apertura and Clausura tournaments participate in the 2009–10 CONCACAF Champions League.
| bgcolor=#B0D3FB align="center" width= 5% | Position | bgcolor=#B0D3FB align="center" | Player | bgcolor=#B0D3FB align="center" | Team | bgcolor=#B0D3FB align="center" width= 9% | Goals |
| bgcolor=#00B2EE align="center" rowspan="1" | 1 | Adrián Apellaniz | 10 | ||||
| 2 | Fabián Muñoz | Zacapa | 9 | ||||
|---|---|---|---|---|---|---|---|
| Gastón Linares | Heredia | ||||||
| Carlos Castillo | Suchitepéquez | ||||||
| 5 | Rolando Fonseca | Comunicaciones | 7 | ||||
| Jhonny Cubero | Xelajú | ||||||
| 7 | Francisco Pavón | Xelajú | 6 | ||||
| Jorge Estrada | Marquense |
Colors: Blue = home team win; White = draw; Red = away team win.
Comunicaciones as tournament champion qualified to the 2009–10 CONCACAF Champions League.
| bgcolor=#B0D3FB align="center" width= 5% | Position | bgcolor=#B0D3FB align="center" | Player | bgcolor=#B0D3FB align="center" | Team | bgcolor=#B0D3FB align="center" width= 9% | Goals |
| bgcolor=#00B2EE | 1 | Carlos González | Municipal | 10 | |||
| 2 |  Carlos Asprilla | Petapa | 8 | ||||
| Walter Estrada | Xinabajul | ||||||
| 4 | Carlos Castillo | Suchitepéquez | 7 | ||||
| Carlos Leguizamón | Suchitepéquez | ||||||
| 6 |  Evandro Ferreira | Heredia | 6 | ||||
| Mario Castellanos | Heredia |
Colors: Blue = home team win; White = draw; Red = away team win.
Jalapa as tournament champion qualified to the 2009–10 CONCACAF Champions League.
At the end of the season, the 10th placed team (the team with the fewest points) in the aggregate table standings (the combined standings of both the Apertura and Clausura tournaments) is relegated to the second division automatically at the end of the Clausura tournament.