Izsak is a small lunar impact crater that is located on the Moon's far side, hidden from view from the Earth.

It lies about half-way between the walled plains Fermi to the northeast and Milne to the southwest.

Due south of Izsak is the larger crater Schaeberle.

Izsak is a circular, nearly symmetric crater formation with a sharp-edged rim that has received little erosion.

[1] By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Izsak.