Sinéad Derrig
| Sinéad Derrig | |
|---|---|
| Born | Sinéad Mason 2 March 1899 Craigaroddan, Ards, County Down, Ireland | 
| Died | 3 April 1991 (aged 92) Booterstown, Dublin, Ireland | 
| Nationality | Irish | 
| Known for | Michael Collins' personal secretary | 
| Spouse | Thomas Derrig | 
| Children | 2 | 
Sinéad Derrig (Irish: Sinéad Ní Dheirg; 2 March 1899 – 3 April 1991) was an Irish civil servant and Michael Collins' personal secretary, acting as “almost his left hand”.