Cummeragh River Bog is a national nature reserve of approximately 112.5 acres (0.455 km2) in County Kerry.

Cummeragh River Bog was legally protected as a national nature reserve by the Irish government in 1994.

The area is completely surrounded by the Cummeragh River and its tributary.

It contains a network of hummocks and pools with a thick, established cover of vegetation.

Among the fauna found on the reserve are curlews and the black slug as well as the rivers containing spawning areas for sea trout.