Sinan is an impact crater on the planet Mercury, 134 kilometers in diameter.

It has one craterlet on the south-southwestern side of the crater floor, and it has a symmetrical pit slightly west of the center.

Together with a smaller unnamed crater on its southern border, the crater Sinan forms a shape similar to that of the spade found in card games.

The crater is named after Mimar Sinan, a 16th-century Turkish architect.

This article about an impact crater on Mercury is a stub.