2005 Washington Nationals season Game log September

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| September 23 | New York Mets | 2-5 (10) | Majewski (4-4) | 30194 | 78-76 |
| September 24 | New York Mets | 2-5 | Hernández (15-9) | 32467 | 78-77 |
| September 25 | New York Mets | 5-6 | Hughes (1-1) | 29967 | 78-78 |
| September 26 | @ Florida Marlins | 4-0 | Vargas (5-5) | 11467 | 79-78 |
| September 27 | @ Florida Marlins | 11-1 | Willis (22-10) | 11507 | 80-78 |
| September 28 | @ Florida Marlins | 11-7 | Moehler (6-12) | 11961 | 81-78 |
| September 30 | Philadelphia Phillies | 3-4 | Hernández (15-10) | 30375 | 81-79 |