Ruthenia may refer to:

Ruthenia, a name applied to various East Slavic lands Red Ruthenia, an East Slavic historical region Black Ruthenia, an East Slavic historical region White Ruthenia, an East Slavic historical region Carpathian Ruthenia, an East Slavic region (Rusynia) on the both sides of Carpathian Mountains Inner Carpathian Ruthenia, sub-region of Carpathian Ruthenia on the inner side of Carpathian Mountains Outer Carpathian Ruthenia, sub-region of Carpathian Ruthenia on the outer side of Carpathian Mountains Subcarpathian Ruthenia, relative term, most commonly used for the Inner Carpathian Ruthenia Ciscarpathian Ruthenia, relative term, most commonly used for the Outer Carpathian Ruthenia Transcarpathian Ruthenia, relative term, used in different geographical contexts, depending on a point of observation Kingdom of Ruthenia, an East Slavic kingdom in the 13th century Voivodeship of Ruthenia, a province of the early modern Kingdom of Poland Grand Principality of Ruthenia (1658), a proposed state (1658) Ruthenium oxide, via the *-ia terminology for metal oxides See also Ruthenian (disambiguation) Russia (disambiguation) Rus (disambiguation) Ruś (disambiguation)