Conrad Weiser was an eighteenth century American diplomat who worked for peace and reconciliation between the European settlers and the native peoples of Pennsylvania. Of Lutheran descent, he was the father-in-law of Henry Melchior Muhlenberg (October 7).

Born in Germany in 1696, he immigrated to the United States as a child. At 17, Weiser went to live among the Mohawks in New York in order to learn their language and culture. He later made his way to southeastern Pennsylvania where he learned customs and language of the Iroquois.