| Competition: | BGL Ligue |
| Season: | 2009–10 |
| Winners: | Jeunesse Esch 29th title |
| Relegated: | US Rumelange Mondercange |
| Continentalcup1: | Champions League |
| Continentalcup1 Qualifiers: | Jeunesse Esch |
| Continentalcup2: | Europa League |
| Continentalcup2 Qualifiers: | F91 Dudelange CS Grevenmacher FC Differdange 03 (via domestic cup) |
| Biggest Home Win: | FC Differdange 03 7-0 Racing FC |
| Biggest Away Win: | Mondercange 0-9 F91 Dudelange |
| Highest Scoring: | Fola Esch 5-4 Etzella Ettelbruck Mondercange 0-9 F91 Dudelange RM Hamm Benfica 7-2 Pétange |
| Matches: | 182 |
| Total Goals: | 555 |
| Prevseason: | 2008–09 |
| Nextseason: | 2010–11 |
The 2009–10 Luxembourg National Division (also known as BGL Ligue due to sponsorship reasons) was the 96th season of top-tier football in Luxembourg. It began on 2 August 2009 and ended on 29 May 2010. F91 Dudelange were the defending champions.
SC Steinfort and FC Avenir Beggen were relegated to the Division of Honour after finishing 13th and 14th in 2008–09. They were replaced by Division of Honour 2008–09 champions CS Pétange and runners-up FC Mondercange.
US Rumelange as 12th-placed team had to compete in a single play-off match against 3rd-placed Division of Honour side FC Erpeldange 72. Rumelange won the match, 2–0, and thus retained their National Division status.
| Team | Venue | Capacity | |
|---|---|---|---|
| Stade du Thillenberg | 7,830 | ||
| Stade Jos Nosbaum | 2,600 | ||
| Stade Am Deich | 2,650 | ||
| Stade Émile Mayrisch | 3,900 | ||
| Op Flohr Stadion | 4,000 | ||
| Stade de la Frontière | 5,400 | ||
| Stade um Bëschel | 1,000 | ||
| Stade Communal | 2,050 | ||
| Stade Municipal (Pétange) | 3,300 | ||
| Stade Jos Haupert | 4,830 | ||
| Stade Achille Hammerel | 5,814 | ||
| Luxembourg-Cents | 2,800 | ||
| Stade Municipal (Rumelange) | 2,950 | ||
| Stade Alphonse Theis | 3,058 |
12th-placed UN Käerjeng 97 competed in a relegation play-offs match against the third-placed team from the Division of Honour, CS Oberkorn, for one spot in next season's competition. UN Käerjeng 97 retained their spot in the league, beating CS Obercorn 3–1.
| Rank | Player | Club | Goals |
|---|---|---|---|
| 1 |  Daniel Huss | CS Grevenmacher | 20 |
| 2 |  Joris Di Gregorio | Fola Esch | 16 |
| 3 |  Anel Pjanić | CS Pétange | 12 |
| Nicolas Caldieri | Progrès Niederkorn | ||
| Romain Zewe | UN Käerjéng 97 | ||
| 6 |  Johan Sampaio | Swift Hesperange | 11 |
| 7 | Djilali Kehal | RM Hamm Benfica | 10 |
| 8 | Aoued Aouaichia | RM Hamm Benfica | 9 |
| Daniel da Mota | F91 Dudelange | ||
| 10 | Aurélien Joachim | FC Differdange 03 | 8 |
 Stéphane Piron | Jeunesse Esch | ||
| Stéphane Martine | Racing FC | ||
| Pierre Piskor | FC Differdange 03 |