Hedwig (or Heilwig; c. 1260 – 1285/1286), a member of the royal House of Habsburg, was Margravine of Brandenburg from 1279 until her death, by her marriage with the Ascanian margrave Otto VI of Brandenburg-Salzwedel.

Hedwig was born in Rheinfelden, Swabia, the seventh of nine children of Count Rudolf IV of Habsburg and his first wife, Gertrude of Hohenberg.

[1] The Habsburgs did not play much of a role in history until the time of Hedwig's father, Count Rudolf, was elected king of Germany in 1273, whereafter the family rose to one of the most powerful ruling dynasties in the Holy Roman Empire.

Hedwig and Otto VI were married in 1279 at the Habsburg residence in Vienna, Austria.

In 1285 or 1286, her husband renounced all claims to the Margraviate of Brandenburg in favour of his brother and joined the Knights Templar.