Ballynageeragh Portal Tomb, Neolithic portal tomb in County Waterford, Ireland.

Ballynageeragh Portal Tomb is a Neolithic stone burial chamber in County Waterford, made from standing stones arranged to form an underground burial space. A large flat stone lies on top as a cap, supported by several uprights that protect the interior.

This burial chamber was built in the 4th millennium before Christ as a resting place for early settlers of the region. Archaeologists examined it in the 1930s and found cremated bones, flint tools, and charcoal inside the chamber.

The Irish name Baile na gCiarraíoch is anglicised as Ballynageeragh. The tomb stands in flat pasture near the headwaters of the Annestown River, and its chamber faces southwest toward the setting sun. Excavations in the late 1930s found cremated bone, flint and charcoal in the chamber.

The site sits in open countryside and is accessible on foot, though there are no facilities or shelter at the location. Wear appropriate clothing for outdoor weather and allow time to explore the surrounding landscape around the monument.

The 1944 restoration added a concrete wall at the rear to support the capstone, and the side stones were not returned to their original positions. The capstone also rests on a former doorstone at the front and a cushion stone at the back, giving the tomb a double-capstone look similar to Knockeen.