| Trenque Lauquen | |
| Native Name: | Partido de Trenque Lauquen |
| Settlement Type: | Department |
| Image Blank Emblem: | Municipio trenque lauquen logo.png |
| Blank Emblem Size: | 150 |
| Coordinates: | -35.9667°N -103°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Established Title: | Established |
| Established Date: | April 12, 1876 |
| Founder: | Conrado Excelso Villegas |
| Seat Type: | Seat |
| Seat: | Trenque Lauquen |
| Leader Party: | UCR |
| Leader Title: | Mayor |
| Leader Name: | Miguel Fernández |
| Unit Pref: | Metric |
| Area Total Km2: | 5500 |
| Population Total: | 40181 |
| Population Density Km2: | auto |
| Population Demonym: | trenquelauquenche |
| Postal Code Type: | Postal Code |
| Postal Code: | B6400 |
| Postal2 Code Type: | IFAM |
| Postal2 Code: | BUE126 |
| Area Code Type: | Area Code |
| Area Code: | 02392 |
| Blank Name Sec1: | Patron saint |
| Blank Info Sec1: | Nuestra Señora del Rosario |
Trenque Lauquen is a subdivision (partido) of the Buenos Aires Province, Argentina, 4460NaN0 to the west of the city of Buenos Aires. The main town is Trenque Lauquen.