Hochburg-Ach is a municipality in the district of Braunau am Inn in the Austrian state of Upper Austria.

Hochburg-Ach lies in the Innviertel on the Germany border, directly opposite the Bavarian town of Burghausen.

It lies east of the Salzach.

About 42 percent of the municipality is forest and 52 percent farmland.

This Upper Austria location article is a stub.