1956–57 League of Ireland
| Season | 1956–57 | 
|---|---|
| Champions | Shamrock Rovers (8th title) | 
| European Cup | Shamrock Rovers | 
| Matches played | 132 | 
| Goals scored | 484 (3.67 per match) | 
| Top goalscorer | Tommy Hamilton Donal Leahy (15 goals)  | 
| Biggest home win | Waterford 10–2 Limerick | 
| Biggest away win | Limerick 1–6 Shelbourne F.C. Shelbourne 0–5 Evergreen United  | 
| Highest scoring | Waterford 10–2 Limerick | 
← 1955–56  1957–58 →   | |
The 1956–57 League of Ireland was the 36th season of senior football in the Republic of Ireland.
St Patrick's Athletic were the defending champions.