Peter Ritter von Rittinger or Peter von Rittinger (see styling variants at Ritter) (23 January 1811 Nový Jičín / Neutitschein – 7 December 1872 Vienna) was an Austrian pioneer of mineral processing.

This separation process was based on differing specific gravities of minerals in the slurry, which in Rittinger's structure, along with other solids and water, continuously moved down a slightly inclined plane in parabolic paths.

A common method of obtaining salt in Austria is also due to Peter Rittinger.

In 1850, as a Section Council for the structure of art and conditioning specialist at the Ministry of Mining and Landescultur, he was summoned to Vienna.

He left numerous publications to his special field, mineral processing, in which he was regarded as internationally recognized authority.