thumb|Gölyazı, a village on Lake Uluabat
thumb|View of Gölyazı
Lake Uluabat ( and ) is the name of a freshwater lake in the vicinity of Bursa, Turkey. It is a large lake, covering an area of between 135 and 160 km<sup>2</sup> depending on the water level, but very shallow, being only 3 m deep at its deepest point. The lake contains eight islands and one other that is sometimes an island and sometimes a peninsula. The largest island is known as Halilbey Island. In the southwest the lake is fed by the Mustafakemalpaşa River, which has formed a silty delta. Water leaves the lake by way of the Ulubat stream, flowing to the west, and reaches the Sea of Marmara via the Susurluk River.
Ecology
left|150px|[[white water lily beds]]Lake Uluabat is a large, long, shallow inland lake that is surrounded by marshes and agricultural land.
One of the most well-known features of Lake Uluabat is the small island village of Gölyazı—an ancient Greek settlement near modern-day Bursa. Gölyazı was featured in the final episode of the Turkish TV series Kara Para Aşk. The Gölyazı Old Mosque, located on the peninsula is a UNESCO World Heritage Site.
Wildlife
The lake, which has an "Unprotected Status" (UP), was declared by BirdLife International as an Important Bird Area in 1989 for its waterfowl species of international character and species which are globally threatened.