Daniel Mulhall (born 8 April 1955) is a retired Irish diplomat and a former Ambassador of Ireland to the United States.

Mulhall then became First Secretary at the Embassy of Ireland in Vienna, followed by a posting to the Permanent Representation to the European Union in Brussels in 1990.

[5] He called on the British government to remain in the Customs Union "to minimise the impact of Brexit on the Good Friday Agreement".

[7] In August 2017, he arrived in Washington DC and presented his credentials to US President Donald Trump when he was officially installed as Ambassador to the US.

[1] In March 2022 New York University announced that after his retirement from the Department of Foreign Affairs in August 2022 Mulhall would become global distinguished professor in Irish studies, teaching an undergraduate seminar, "Literature as History: Ireland 1880-1940".