The Hundred of Dungleddy was a hundred in the centre of Pembrokeshire, Wales. It had its origins in the pre-Norman cantref of Deugleddyf. It derives its Welsh name from its position between the two branches of the River Cleddau (Cleddyf): the English form is a corruption of the Welsh. The area of the cantref was around 185 km2: it was the smallest of the seven cantrefi of Dyfed. As their names imply, the civil headquarters of the commotes were at Wiston and Llawhaden, and the latter the cantref's ecclesiastical centre, perhaps the seat of a bishop during the Age of the Saints.