Khadzhibey Estuary, or Khadzhibeyskyi Liman (Ukrainian: Хаджибейський лиман, Turkish: Haci Bey liman), is an estuary of the north-western part of the Black Sea, located on the north-west from the City of Odessa. It is separated from the sea by the sandbar, which has about 5 km length. The length of the estuary is 31 km, width 0.5–2.5 km, square 70 km², depth up to 2.5 m. The bottom of the estuary is covered by the flakes of black mud, which have healthy properties. The river Malyi Kuyalnyk flows to the estuary.