Merthyr Tydfil County Borough is located in the historic county of Glamorgan in Wales. It covers an area of and had a population of approximately 58,900 in 2021. The Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales was established in 2002 and given statutory status in 2022. It is administered by Cadw, the historic environment agency of the Welsh Government. It includes just under 400 sites, ranging from gardens of private houses, to cemeteries and public parks. Parks and gardens are listed at one of three grades, matching the grading system used for listed buildings. Grade I is the highest grade, for sites of exceptional interest; Grade II*, the next highest, denotes parks and gardens of more than special interest; while Grade II denotes nationally important sites of special interest. There are three sites on the register of parks and gardens in Merthyr Tydfil County Borough. Two are listed at grade II*, and one is grade II. Key List of parks and gardens |} See also List of scheduled monuments in Merthyr Tydfil County Borough Grade I listed buildings in Merthyr Tydfil County Borough Grade II* listed buildings in Merthyr Tydfil County Borough Notes References Register of Parks and Gardens of Special Historic Interest in Wales