| "Notoriously disaffected to the Government" : British allegations of Irish disloyalty in eighteenth-century Newfoundland | Mannion, John | Article in Journal | | 2000 |
| A transatlantic merchant fishery : Richard Welsh of New Ross and the Sweetmans of Newbawn in Newfoundland, 1734-1862 | Mannion, John | Article in Book | | 1987 |
| Colonial beginnings : Lord Baltimore's Irish experience | Mannion, John | Article in Book | | 2012 |
| Colonial beginnings : Lord Baltimore's Irish experience | Mannion, John | Article in Journal | | 2005 |
| From comfortable farms to mercantile commerce and cultural politics : the social origins and family connections of Thomas Francis Meagher | Mannion, John | Article in Journal | | 2003 |
| Genealogy, geography and social mobility : the family background of Thomas Francis Meagher | Mannion, John | Article in Book | | 2006 |
| Henry Shea (1767-1830) - a Tipperary trader in Newfoundland | Mannion, John | Article in Journal | | 1988 |
| Irish merchants abroad : the Newfoundland experience, 1750-1850 | Mannion, John | Article in Journal | | 1986 |
| Irish migration and settlement in Newfoundland : the formative phase, 1697-1732 | Mannion, John | Article in Journal | | 2001 |
| Kilkenny men in Newfoundland | Mannion, John | Article in Journal | | 1987 |
| Migration and Upward Mobility : The Meagher Family in Ireland and Newfoundland, 1780-1830 | Mannion, John J. | Article in Journal | | 1988 |
| Migration and upward mobility : the Meagher family in Ireland and Newfoundland, 1780-1830 | Mannion, John | Article in Journal | | 1988 |
| Old World antecedents : New World adaptations : Inistioge (Co. Kilkenny) immigrants in Newfoundland | Mannion, John | Article in Journal | | 1989 |
| Old world antecedents, New World adaptations : Inistioge immigrants in Newfoundland | Maddock, FidelmaMannion, John | Article in Book | | 1990 |
| Patrick Morris and Newfoundland Irish immigration | Mannion, John | Article in Book | | 1986 |
| Point Lance: an Irish settlement in Newfoundland | Mannion, John | Article in Book | | 2011 |
| Sources for the study of trade in Waterford and hinterland during the 18th and 19th centuries | Mannion, John | Article in Journal | | 1977 |
| The maritime trade of Waterford in the eighteenth century | Mannion, John | Article in Book | | 1988 |
| The Nevins family, 1800-40 | Mannion, John | Article in Journal | | 1988 |
| The Waterford merchants and the Irish-Newfoundland provisions trade, 1770-1820 | Mannion, John | Article in Book | | 1980 |
| Transatlantic disaffection : Wexford and Newfoundland 1798-1800 | Mannion, John | Article in Journal | | 1998 |
| Vessels, masters and seafaring : patterns in Waterford voyages, 1766-1771 | Mannion, John | Article in Book | | 1992 |
| Victualling a fishery : Newfoundland diet and the origins of the Irish provisions trade, 1675-1700 | Mannion, John | Article in Journal | | 2000 |
| Waterford and the south of England : spatial patterns in shipping commerce, 1766-1777 | Mannion, John | Article in Journal | | 1994 |
| Waterford’s Maritime World : The Ledger of Walter Butler, 1750–1757 | Mannion, John | Monograph or Collective Volume | Four Courts Press | 2022 |