Principality of Rus'

Principality of Rus' or Duchy of Rus' may refer to:


 * Principality of Halychian Rus', an East Slavic medieval state, centered in Halych
 * Principality of Volhynian Rus', an East Slavic medieval state, centered in Volhynia
 * Principality of Halych-Volhynian Rus', an East Slavic medieval state, uniting Halych and Volhynia
 * Principality of Rus' (1658), a proposed state in Eastern Europe
 * Duchy of Rus' (voivodeship), a province of the early modern Kingdom of Poland (from 15th to 18th century)