| Office: | Senator |
| Term Start: | 1 November 1989 |
| Term End: | 17 February 1993 |
| Constituency: | Dublin University |
| Office1: | Lord Mayor of Dublin |
| Term Start1: | 3 June 1987 |
| Term End1: | 5 June 1988 |
| Predecessor1: | Bertie Ahern |
| Successor1: | Ben Briscoe |
| Birth Name: | Carmencita Cruess Callaghan |
| Birth Date: | 23 October 1939 |
| Birth Place: | Dublin, Ireland |
| Party: | Independent |
| Children: | 5 |
| Relatives: | Joseph Cruess Callaghan (uncle) |
| Alma Mater: | Trinity College Dublin |
Carmencita Hederman (; born 23 October 1939) is a former Irish Independent politician who served as Lord Mayor of Dublin from 1987 to 1988 and a Senator for the Dublin University constituency from 1989 to 1992.[1]
She was a member of Dublin City Council from 1974 to 1999.[2]
She was the daughter of George Cruess Callaghan and sister of Frank Cruess Callaghan, both successful businessmen as well as the niece of Joseph Cruess Callaghan.[3] She was Lord Mayor of Dublin from 1987 to 1988 during the Dublin Millennium celebrations.[4] She was elected to the Seanad in 1989 for the Dublin University constituency.[5]
Her husband was William Hederman (from 1962 until his death on 30 December 2016). A third-generation doctor and surgeon, Billy Hederman—son of William, a general practitioner on the staff of Limerick County Hospital in Croom and Ethel (née Hannigan) Hederman—was president of the Royal College of Surgeons in Ireland from 1990 to 1992 and later president of the Vascular Society of Great Britain and Ireland.[6]
Her daughter, Wendy Hederman, was also later councillor on Dublin City Council, representing the Progressive Democrats.[7]