Las Parejas is a city in the southwest of the province of Santa Fe, Argentina, on National Route 178.

The town was founded in 1889 on lands belonging to the Ferrocarril Central Argentino railway company.

The economy of Las Parejas is based on agriculture and (on a smaller scale) cattle farming.

Las Parejas and Armstrong are home to 20% of the productive capacity of this industry, which supplies a growing local demand and is beginning to export.

Las Parejas was declared "Provincial Capital of the Small and Medium Enterprise" in 2004.