Konrad VIII the Younger (Polish: Konrad VIII Młody; after 1397 – before 5 September 1444), was a Duke of Oleśnica, Koźle, half of Bytom and half of Ścinawa during 1416–1427 (with his brothers as co-rulers) and sole Duke of half of Ścinawa since 1427 until his death.
He was the fifth and youngest son of Konrad III the Old, Duke of Oleśnica, by his wife Judith. Like his four older brothers, at the baptism he received the name of Konrad, which was characteristic in this branch of the House of Piast.
The modesty of his father's legacy forced that, of the five sons of Konrad III, three decided to follow the ecclesiastic career; Konrad VIII was one of them. The Church, during the time of the political fragmentation of Poland and the enormous progeny of the Piast dynasty, was the easiest way to develop influence in the fate of Silesia, by obtaining the prestigious (and profitable) Church dignities, which Piast princes easily accepted. The oldest of the brothers, Konrad IV, was made Provost of Wroclaw, and since 1417 Bishop of Wroclaw, and other, Konrad VI, in 1414, was appointed Dean of the Wroclaw Chapter.
In 1416, Konrad VIII became in a Teutonic Knight. Perhaps this decision was prompting by his brother Konrad VII the White, who fight at the side of the Teutonic Order in 1410 in the Battle of Grunwald. During the solemn religious vows of submission in Malbork Castle, Konrad VIII was accompanied by all his brothers. Then, in exchange for a loan of 3,000 Prague groschens, Konrad IV, Konrad V Kantner and Konrad VII concluded with the Great Master of the Teutonic Order, Michael Küchmeister von Sternberg, an alliance against Poland and Lithuania. Committed themselves to assist in the Order, if that was attacked by the army of King Wladyslaw II Jagiello of Poland and Grand Duke of Lithuania Witold.