The Romashkino field (Russian: Ромашкинское нефтяное месторождение; Tatar: Ромашкино нефть чыганагы) is an oil field in Leninogorsky District, southeastern Tatarstan, Russia. Discovered in 1948 by the village of Romashkino, it is the largest oil field of Volga-Ural Basin. The field is operated by Tatneft.

The field covers approximately 4,200 square kilometres (1,600 sq mi). The oil deposit is lays in depth of about 1,800 metres (5,900 ft) in Kinovskiy and Pashiyskiy formations. Since its commissioning, the Romashkino field had produced over 15 billion barrels (2.4×10^⁹ m³) of oil. Statistic analysis predicted depletion at 16.5 to 17.2 billion barrels (2.62×10^⁹ to 2.73×10^⁹ m³). However, advanced technologies allow for extraction of more oil.

54°34′22.6″N 52°22′11.9″E / 54.572944°N 52.369972°E / 54.572944; 52.369972