Catherine Murphy (born 1 September 1953) is an Irish former Social Democrats politician who served as a Teachta Dála (TD) for the Kildare North constituency from 2011 to 2024, and previously from 2005 to 2007.

Originally becoming involved in politics through campaigns against high local service charges in Leixlip, she joined the Workers' Party in 1983.

[2] Charlie McCreevy, the Fianna Fáil TD for Kildare North, resigned from the Dáil in November 2004, when he was appointed as a European Commissioner.

On a low turnout, she polled slightly fewer first-preference votes than Fianna Fáil's Áine Brady, but was elected on the fifth count.

Brady was elected on the first count; Murphy held on until the last, when Fine Gael's Bernard Durkan reached the quota by transfers from his eliminated running mate.

[10] On 27 May 2015, Murphy attempted to raise issue in the Dáil the issue of billionaire Denis O'Brien receiving an injunction barring the media from revealing details of his request that the liquidator of the Irish Bank Resolution Corporation continue favourable terms O'Brien had received from the bank.

[11] Tonight with Vincent Browne (with Browne absent and instead moderated by Ger Colleran, editor of INM's Irish Daily Star) featured Colleran reading a statement from TV3 management asserting that no discussion about Murphy's comments would be allowed following letters from O'Brien's lawyers.

[11] Foreign commentators covering these events for the international media suggested Irish democracy had been "wiped away at a stroke".