| El Trébol | |
| Native Name Lang: | es |
| Settlement Type: | City |
| Pushpin Map: | Argentina |
| Pushpin Map Caption: | Location of El Trébol in Argentina |
| Coordinates: | -32.1833°N -104°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Argentina |
| Subdivision Type1: | Province |
| Subdivision Type2: | Department |
| Subdivision Name2: | San Martín |
| Leader Party: | Socialist Party |
| Leader Title: | Mayor |
| Leader Name: | Fernando Almada |
| Unit Pref: | Metric |
| Area Total Km2: | 344 |
| Elevation M: | 92 |
| Population Total: | 11086 |
| Population As Of: | 2010 census |
| Population Density Km2: | auto |
| Timezone1: | ART |
| Utc Offset1: | -3 |
| Postal Code Type: | CPA base |
| Postal Code: | S2535 |
| Area Code Type: | Dialing code |
| Area Code: | +54 3401 |
El Trébol is a small city in the San Martín Department, west-center of the province of Santa Fe, Argentina, 179 km from the provincial capital. It has about 11,086 inhabitants as per the . Its foundation date is locally acknowledged as 15 January 1890 (the date when the first train arrived in town), though the official date in the provincial records is 17 April 1894.
The name of the city was a result of the British involvement in the financing of the railroad system. The Ferrocarril Central Argentino company named three consecutive train stations after symbolic plants of Great Britain: Las Rosas (literally "The Roses", a reference to England), Los Cardos ("The Thistles", referring to Scotland), and El Trébol ("The Clover", a symbol of Ireland).