Under Law No. 6360, Ergene District was established in Tekirdağ Province, separating from Çorlu District. Ergene District was formed by merging the Sağlık and Yeşiltepe neighborhoods of Çorlu District with the municipalities of Ulaş, Misinli, and Velimeşe, and the villages of Paşaköy, Pınarbaşı, Ahimehmet, İğneler, Vakıflar, Esenler, Kırkgöz, Bakırca, Karamehmet, and Yulaflı. The district center is Marmaracık.

The district generally has flat terrain, and its soil is fertile. Located in the interior, it has a continental climate, with hot and dry summers and cold and rainy winters.

It is the area in Thrace with the least rainfall. 20% of the rainfall occurs in spring, 10% in summer, 30% in autumn, and 40% in winter. The Ergene stream passes through the district. This stream is a tributary of the Meriç River, the largest river in Thrace. Near Muratlı District, it merges with Çorlu Creek and flows into the Meriç River near Uzunköprü District. The Ergene Stream is fed by the eastern slopes of the Istranca Mountains and connects with several seasonal creeks. The Ergene River is used for irrigating agricultural lands. Due to industrial pollution, Çorlu Creek has become unusable. Other important creeks are Pınarbaşı, Esece, and Ahimehmet. Rich in sand and stone, Yulaflı Quarry in the region meets the needs of the Thrace Region.