The South Branch of the Israel River is a 6.8-mile-long (10.9 km)[1] river in the White Mountains of New Hampshire in the United States.

For most of its length, it is within the White Mountain National Forest.

The South Branch rises on the western slopes of Mount Jefferson in the Presidential Range of the White Mountains.

It flows west, between the Ridge of the Caps to the south and Castellated Ridge to the north, then turns northwest when it reaches the Jefferson Notch Road.

This article related to a river in New Hampshire is a stub.