| A memorial of the ministerial life of Gideon Ouseley, Irish missionary, etc. | Reilly, William | Monograph or Collective Volume | | 1847 |
| Charles Vallancey and the Military Itinerary of Ireland | O'Reilly, William | Article in Journal | | 2006 |
| Dutch writings on southern Ireland in the 1790s | O'Reilly, William | Article in Journal | | 1999 |
| Ireland in the Atlantic world: migration and cultural transfer | O'Reilly, William | Article in Book | | 2018 |
| Orientalist Reflections : Asia and the Pacific in the Making of late Eighteenth-Century Ireland | O'Reilly, William | Article in Journal | | 2004 |
| Roscommon in the service of the Hapsburg Empire: County volunteers in the Austrian army | O'Reilly, William | Article in Journal | | 1998 |
| The Mac Dermots of Moylurg. Familial origins and connections with Boyle Abbey | O'Reilly, William | Article in Journal | | 1994 |
| The Naturalization Act of 1709 and the settlement of Germans in Britain, Ireland and the colonies | O'Reilly, William | Article in Book | | 2001 |
| The sailing cot or 'gabbard' of the River Slaney | O'Reilly, WilliamTully, Darina | Article in Book | | 2008 |
| Thomas Reilly - a Crimean veteran from Tulla, Co. Clare | O'Reilly, William | Article in Journal | | 2002 |