Bartholomeus VI. Welser (the younger, 26 October 1512 – c. 17 May 1546) was a member of the Welser banking family, which had acquired the colonial rights to Venezuela Province in 1528 and created Klein-Venedig. He was the son of Bartholomeus V. Welser (the elder). In 1540, he journeyed to Venezuela to join an expedition by Governor Georg von Speyer. Finding Speyer dead on his arrival, he joined the new governor, Philipp von Hutten, in exploring Venezuela.