The boyars of Moldavia and Wallachia were the nobility of the Danubian Principalities of Moldavia and Wallachia. The title was either inherited or granted by the Hospodar, often together with an administrative function. The boyars held much of the political power in the principalities and, until the Phanariote era, they elected the Hospodar.

Wallachia or Walachia is a historical and geographical region of modern-day Romania. It is situated north of the Lower Danube and south of the Southern Carpathians. Wallachia was traditionally divided into two sections, Muntenia and Oltenia. Dobruja could sometimes be considered a third section due to its proximity and brief rule over it. Wallachia as a whole is sometimes referred to as Muntenia through identification with the larger of the two traditional sections.