Conrad I of Brandenburg-Stendal

Conrad I (c. 1240–1304) was a son of Margrave John I and Sophie of Denmark, and from 1266 co-ruler of Brandenburg-Stendal with his brothers, taking the newly won Neumark east of the Oder as his share. In 1260 he married Constance, daughter of Duke Przemysł I of Greater Poland.

Under the 1269 Treaty of Arnswalde he helped Otto IV occupy Gdańsk. He died in 1304 and was buried beside his wife in Chorin Abbey; his son Waldemar later reunited the Brandenburg lines.