Final answer:
The colony that did not allow slavery until 1751 was Georgia.
Step-by-step explanation:
The colony that did not allow slavery until 1751 was Georgia. Founded in 1732 by James Oglethorpe, Georgia was initially intended to be a haven for debtors and a buffer between Spanish-controlled Florida and the rest of the British colonies. Oglethorpe believed that slavery was socially and economically harmful, so he specifically banned it in the colony.
Learn more about Slavery in American colonies