Baron Tredegar, of Tredegar in the County of Monmouth, was a title in the Peerage of the United Kingdom. It was created on 16 April 1859 for the Welsh politician Sir Charles Morgan, 3rd Baronet, who had earlier represented Brecon in Parliament. His eldest son, Charles Rodney Morgan, sat as Member of Parliament for Brecon, but predeceased his father. Lord Tredegar was therefore succeeded by his second son, the second Baron.

Tredegar House is a 17th-century Charles II-era mansion in Coedkernew, on the southwestern edge of Newport, Wales. For over five hundred years it was home to the Morgan family, later Lords Tredegar, one of the most powerful and influential families in the area. Described as "the grandest and most exuberant country house in Monmouthshire" and one of the "outstanding houses of the Restoration period in the whole of Britain", the mansion stands in a reduced landscaped garden of 90 acres (0.36 km2). The property became a Grade I listed building on 3 March 1952 and has been under the care of the National Trust since March 2012. The park surrounding the house is designated Grade II* on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales.