Pilar is the capital city of the Paraguayan department of Ñeembucú, located along the Paraguay River in the southwestern part of the country. Located about 258 km (160 mi) from Asunción, Pilar serves as an important center of commerce and government for the far southwestern region of the country.

Alberdi is a town in the Ñeembucú department of Paraguay. It is 144 km (89 mi) south of the capital city, Asunción. As of 2021, the population of Alberdi is 9,679.