The Penner is also called Pennar, Penna or Penneru. It is a river that flows in south India. The Penner River originates in the Nandi Hills in the Kolar district of Karnataka. It flows five hundred and sixty kilometers (350 miles) in the north and east direction through the state of Andhra Pradesh and evacuates in the Bay of Bengal.

The drainage basin of the Penner River and its tributaries cover the southern parts of Deccan plateau, including most of the Rayalaseema region of Andhra Pradesh and parts of Karnataka. It is the Kolar Plateau, which divides the drainage basin of Penner River and that of the Cauvery, Ponnaiyar and Palar Rivers in the south. The Penner River drains the northern part of the Kolar Plateau, which includes parts of the Kolar and Tumkur districts in the state of Karnataka.

The upper drainage basin of the Penner River includes Cuddapah district, central and eastern parts of Anantapur District, the southern part of Kurnool District and the northwest of the Chittoor district. In its final course, the Penner River flows in the east direction through a gap in the Eastern Ghats and moves in to the plains of Coastal Andhra. It surrenders itself into the Bay of Bengal at Ootukuru, which is the east of Nellore at a distance of 15 kilometres. The estuary of the Penner River extends up to seven kilometers upstream from the Bay of Bengal.

The tributaries of Penner are Jayamangali, Kunderu and Sagileru in the north, and the Chitrabvati, Papaghni and Cheyyeru in the south.