The Wilno Voivodeship was one of 16 Voivodeships in the Second Polish Republic, with the capital in Wilno. The jurisdiction was created in 1926 and populated predominantly by Poles, with notable minorities of Belarusians, Jews and Lithuanians. Before 1926, the voivodeship's area was known as the Wilno Land; it had the same boundaries and was also within the contemporary borders of Poland at the time.

A voivodeship or voivodate is the area administered by a voivode (governor) in several countries of central and eastern Europe. Voivodeships have existed since medieval times and the area of extent of voivodeship resembles that of a duchy in western medieval states, much as the title of voivode was equivalent to that of a duke. Other roughly equivalent titles and areas in medieval Eastern Europe included ban and banate.