Baron Tredegar, of Tredegar in the County of Monmouth, was a title in the Peerage of the United Kingdom. It was created in 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.
Charles Morgan was a politician and soldier, and notably commanded a section of the Light Brigade at the Battle of Balaclava during the Crimean War. Godfrey was 22 and Captain in the 17th Lancers. His horse, Sir Briggs, also survived, and lived at Tredegar House until his death at the age of 28. He was buried with full military honours in the Cedar Garden at the House. The monument still stands there today.
In 1905 he was created Viscount Tredegar, of Tredegar in the County of Monmouth, in the Peerage of the United Kingdom. He never married and the viscountcy became extinct on his death in 1913. He was succeeded in the baronetcy and barony by his nephew, Courtenay, the third Baron. He was the eldest son of the Hon. Frederick Courtenay Morgan, third son of the first Baron. In 1926 the viscountcy was revived when he was created Viscount Tredegar, of Tredegar in the County of Monmouth, in the Peerage of the United Kingdom. Lord Tredegar subsequently served as Lord-Lieutenant of Monmouthshire.
He was succeeded by his only son, the second Viscount. He was a poet and well-known eccentric. Lord Tredegar was childless and the viscountcy became extinct on his death in 1949. He was succeeded in the baronetcy and barony by his uncle, the fifth Baron. He was a younger son of the aforementioned the Hon. Frederic Courtenay Morgan. On his death the titles passed to his son, the sixth Baron. When he died in 1962 the baronetcy and barony became extinct as well.