Beer is a crater lying situated within the Margaritifer Sinus quadrangle (MC-19) region of the planet Mars, named in honor of the German astronomer, Wilhelm Beer.

Beer and collaborator Johann Heinrich Mädler produced the first reasonably good maps of Mars in the early 1830s.

Their choice was strengthened when Giovanni Schiaparelli used the same location in 1877 for his more famous maps of Mars.

Beer lies in the southwest of Meridiani Planum, about 8° from the prime meridian and about 10° west from the crater Mädler.

This article about an impact crater on Mars or its moons is a stub.