Pannekoek is a lunar impact crater that is situated on the far side of the Moon, and cannot be seen directly from the Earth.

The crater lies along the northern edge of the slightly larger Dellinger, and their common border forms an area of uneven terrain.

The crater was named after Dutch astronomer and father of Council Communism, Antonie Pannekoek by the IAU in 1970.

By convention, these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Pannekoek.

Pannekoek S is similar to a few other far-side craters like Mandel'shtam Q and Barbier F that have hummocky floors.