Kot Jai is a town and union council in Dera Ismail Khan District of Khyber-Pakhtunkhwa, Pakistan.

Facilities include a bank, a post office, schools, and a bazaar of about 200 shops.

Nearby villages include Meran Jai (Lundi) to the east, Jara one km to the west where there is a great Muddrassa "Baab un Najaf Jara" , Dhakki 4.5 km to the north, Sadalian and Khanu Khel about 1.5 to 2 km to the south.

To facilitate farmer for selling animal a market is held every week on Saturday by government contractor.

It also had a bus stand, where convenience facility is available between dera ismail khan and kot jai.