Mynydd-y-Garreg or Mynyddygarreg ("The mountain of the stone") is a village in the county of Carmarthenshire, West Wales.

For rail travel, Kidwelly railway station lies 4 km (2.5 miles) away by road.

Bus services through Kidwelly provide links to Llanelli, Carmarthen, Swansea and other places.

[5] The public house in the village, the Prince of Wales, had been recognised by the Campaign for Real Ale (CAMRA) Good Beer Guide.

[6][7] Smarts Quarry, half a mile to the east of the village, is a 2.6 ha Site of Special Scientific Interest notable for its quartzite fossil remains.