Porter is a large-scale impact crater in the Thaumasia quadrangle on the planet Mars, situated in Aonia Terra at 50.8° south and 113.9º west.

The impact caused a bowl 105 kilometres (65 mi) across.

As craters get larger (greater than 10 km in diameter) they usually have a central peak.

[2] The peak is caused by a rebound of the crater floor following the impact.

This article about an impact crater on Mars or its moons is a stub.