Joinings Pool is a notable feature on the Clady River in County Londonderry, Northern Ireland, located near Culnady. It marks the point where the Grillagh River and the Knockoneil River converge, forming the headwaters of the Clady River proper.

The pool is known locally for its depth, created by the merging currents of the two rivers. The surrounding river has changed significantly since its natural state.

A major dredging operation carried out around the mid-twentieth century — undertaken to manage floodwater from the hills of Slaughtneil and from the sluice and flood gates of William Clark & Sons of Upperlands — left the Clady River dramatically altered, reducing it to roughly half its original width while doubling its depth.

The Joinings Pool itself, however, remains a recognised landmark along this stretch of water.