Kings Langley Palace was a 13th-century Royal Palace which was located to the west of the Hertfordshire village of Kings Langley in England. During the Middle Ages, the palace served as a residence of the Plantagenet kings of England. It fell into disuse sometime during the 16th century and became a ruin. Today, nothing remains of the building except for some archaeological remains. The site is a scheduled ancient monument.

King's Langley Priory was a Dominican priory in Kings Langley, Hertfordshire, England. It was located adjacent to the Kings Langley Royal Palace, residence of the Plantagenet English kings.