Piñero is a town in the Rosario Department, province of Santa Fe, Argentina, 14 km southeast of the city of Rosario and 183 km from the city of Santa Fe.

The general relief is very gently undulating due to the lower basin of the Ludueña Stream, which drains into the Paraná River.

The drainage network is organized in most of the area but with slightly weathered channels and no signs of significant erosion.

It has well-defined, thick argillic horizons, hindering the penetration of roots and the distribution and use of water.

Depression areas contain mainly poorly drained sodic and sometimes saline soils.