Viscount Ponsonby of Imokilly in Cork is in Viscount Ireland.
On 20th April 1839 John Ponsonby 1st Viscount Ponsonby [aged 69] was created 1st Viscount Ponsonby of Imokilly in Cork. Frances Elizabeth Villiers Viscountess Ponsonby [aged 53] by marriage Viscountess Ponsonby of Imokilly in Cork.
On 22nd February 1855 John Ponsonby 1st Viscount Ponsonby [aged 85] died at Brighton. Viscount Ponsonby of Imokilly in Cork extinct. His nephew William [aged 39] succeeded 3rd Baron Ponsonby of Imokilly in County Cork.