Mynydd William Meyrick is a 535-metre-high hill[1] straddling the boundary of Bridgend and Rhondda Cynon Taf county boroughs between the valley of the Rhondda Fawr and Ogmore Valley in South Wales.

The hill is formed from Pennant Sandstone overlying a great thickness of the South Wales Coal Measures.

These and other strata are affected by several geological faults, the most significant of which are aligned roughly northwest – southeast.

Landslips affect some of the steeper slopes of the hill, not least those above Price Town on its western side.

A number of public rights of way cross the hill and provide access from neighbouring valleys.