1945 Campeonato Nacional Primera División
| Dates | 19 May – 2 December 1945 |
|---|---|
| Champions | Green Cross (1st title) |
| Matches | 132 |
| Goals | 534 (4.05 per match) |
| Top goalscorer | Ubaldo Cruche Juan Zárate Hugo Giorgi (17 goals) |
| Biggest home win | Audax Italiano 9–2 Universidad Católica (14 October) |
| Total attendance | 742,254 |
| Average attendance | 5,623 |
← 1944 1946 → | |
The 1945 Campeonato Nacional de Fútbol Profesional was Chilean first tier’s 13th season. Green Cross was the tournament’s champion, winning its first title.