Jacob I of Baden (15 March 1407 – 13 October 1453), was Margrave of Baden-Baden from 1431 to 1453.

He was the elder son of Bernard I, Margrave of Baden-Baden and his second wife Anna of Oettingen. Jacob I was a man of deep religious beliefs, well known as a founder of churches. He founded the monastery at Fremersberg and was a major benefactor