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.