Claire D. Cronin (born January 29, 1960) is an American attorney, politician, and diplomat who served as the United States Ambassador to Ireland from 2022 to 2025.

[4] On January 19, 2022, Cronin was sworn in as the United States Ambassador to Ireland in the Massachusetts House of Representatives chamber.

[9] She won a four-way Democratic primary with 33% of the vote, defeating Brockton Councilors-at-Large Robert Sullivan and Jass Stewart, and Southeast Regional School Committee member Mark Linde.

This sweeping piece of legislation marked the most extensive reform of the state's criminal justice system in decades.

[20][21] On January 19, 2022, she was sworn in as the United States Ambassador to Ireland during a formal session of the Massachusetts House of Representatives.

[7] In her remarks at the ceremony, Cronin noted: “President Biden entrusted me as the US Ambassador to Ireland at a very important moment.

President Biden is unequivocal in his support for the Good Friday Agreement, a historic achievement that must be protected to ensure peace and stability in Northern Ireland.” [23] Cronin also is raising awareness of the J-1 visa program for Irish students traveling to the US.

[25] Cronin had also intended to participate in Irish-American festivities alongside Ambassador of Ireland to the United States Daniel Mulhall.