San Jose Villanueva is a small municipality in the Department of La Libertad, El Salvador.

It is located in the south of the Department, bordered by the cities of Nuevo Cuscatlán to the north, Huizucar to the east, the port of La Libertad to the south and Zaragoza to the west.

In the last several years, the municipality has seen an influx of the upper middle class, including the introduction of a gated housing development.

Principal crops include grains, coffee, and grasses.

Of note is a local archaeological site, the Piedra Pintada (Painted Stone), a rock inscribed with three meters of ancient hieroglyphics.