| 'Farewell to Fermanagh' : aspects of emigration from county Fermanagh | Fitzgerald, Patrick | Article in Book | Geography Publications | 2004 |
| A Donegal-born Covenanter Minister in South Carolina: Rev. Thomas Donnelly | Roulston, William | Article in Journal | | 2022 |
| A window into Clogher Church of Ireland diocese : the visitations of 1622 and 1733 | Roulston, WilliamScott, Brendan | Article in Book | | 2017 |
| Abercorn : the Hamiltons of Barons Court | Roulston, William | Monograph or Collective Volume | Ulster Historical Foundation | 2014 |
| Accommodating clergymen : Church of Ireland ministers and their houses in the north of Ireland, c. 1600-1870 | Roulston, William J. | Article in Book | | 2006 |
| An agreement to build a new church in Arboe parish in 1710 | Roulston, William J. | Article in Journal | | 2002 |
| Andrew Elder (1821-86) Castlefin: Campaigner for Land Reform | Roulston, William | Article in Journal | | 2020 |
| Anglican churches in Clogher diocese in the early eighteenth century | Roulston, William J. | Article in Journal | | 2011 |
| Biographer of a bishop : Alexander Clogie, 1614-1698 | Roulston, William | Article in Book | Cumann Seanchais Bhreifne | 2025 |
| British Parliamentary Papers and the local historian and genealogist | Roulston, William J. | Article in Journal | | 2002 |
| Castles, churches and country houses : the lost architecture of county Fermanagh in an age of improvement, c.1700-c.1750 | Roulston, William J. | Article in Book | | 2004 |
| Cultivating a Love for Knowledge: Two hundred Years of the Belfast Natural History and Philosophical Society, 1821-2021 | | Monograph or Collective Volume | Belfast Natural History and Philosophical Society | 2023 |
| Domestic architecture in Ireland, 1640-1740 | Roulston, William J. | Article in Book | | 2007 |
| Fermanagh : history and society : interdisciplinary essays on the history of an Irish county | | Monograph or Collective Volume | Geography Publications | 2004 |
| H.C.Lawlor and the Excavations at Nendrum a Century ago | Roulston, William | Article in Book | | 2023 |
| Introduction | Murphy, Eileen,Roulston, William J. | Article in Book | | 2004 |
| Landed society in Knockninny, c.1660-c.1740 | Roulston, William | Article in Book | | 2019 |
| Landlordism and unionism in Tyrone, 1885-1910 | Roulston, William J. | Article in Book | | 2000 |
| Letterkenny-born outstanding educator: Emma Saxelby | Roulston, William | Article in Journal | | 2024 |
| Lough Neagh : an atlas of the natural, built and cultural heritage | NA | Monograph or Collective Volume | Ulster Historical Foundation | 2022 |
| Memento Mori : the seventeenth century monumental inscriptions | Roulston, William J. | Article in Journal | | 1998 |
| Mills and the rural economy | Roulston, William J. | Article in Book | | 2000 |
| Parliamentary elections in North Tyrone, 1885-1921 | Roulston, William J. | Article in Book | | 2000 |
| Raphoe Diocese: early Protestant places of worship in the 17th century | Roulston, William | Article in Journal | | 2019 |
| Reconstructing an eighteenth-century Ulster family: the Reas of Magheraknock and Killeen, County Down | Roulston, William J. | Article in Journal | | 2004 |
| Researching Belfast Jewish families, c.1850-c.1930 | McIlveen, PamelaRoulston, William J. | Article in Journal | | 2004 |
| Researching Presbyterian ancestors in Ireland | Roulston, William J. | Monograph or Collective Volume | Ulster Historical Foundation | 2020 |
| Researching Scots-Irish ancestors : the essential genealogical guide to early modern Ulster, 1600-1800 | Roulston, William J. | Monograph or Collective Volume | Ulster Historical Foundation | 2005 |
| Restoration Strabane, 1660-1714 : economy and society in provincial Ireland | Roulston, William J. | Monograph or Collective Volume | Four Courts | 2007 |
| Scottish burial and commemoration practices in seventeenth-century Ireland : the writings and memorials of William Montgomery of Rosemount | Roulston, William | Article in Journal | | 2007 |
| Scottish settlement and society in Plantation Ulster, 1610-40 | Roulston, William | Article in Book | | 2016 |
| Seventeenth century church monuments in West Ulster | Roulston, William J. | Article in Journal | | 1997 |
| Seventeenth century manors in the barony of Strabane | Roulston, William J. | Article in Book | | 2005 |
| Strabane Presbyterianism | Roulston, William J. | Article in Book | | 2000 |
| The 1718 migration : from Ulster to New England | Lunney, LindeRoulston, William | Monograph or Collective Volume | Ulster Scots Agency | 2017 |
| The 1733 visitation of Kilmore: a window on an early eighteenth-century Church of Ireland diocese | Roulston, William J. | Article in Journal | | 2006 |
| The archaeological fabric of a manor in the Ulster Plantation : Dunnalong, County Tyrone | Roulston, William J. | Article in Book | NA | 2013 |
| The charter towns of Ulster | Robinson, Philip S.Roulston, WilliamScott, Brendan | Article in Journal | | 2013 |
| The evolution of the Abercorn estate in north west Ulster, 1610-1703 | Roulston, William J. | Article in Journal | | 1999 |
| The Nine Years' War in the north-west | Roulston, William J. | Article in Book | | 2000 |
| The origins of the Reformed Presbyterian Church of Ireland, with some comments on its records | Roulston, William J. | Article in Journal | | 2008 |
| The parish of Upper Badoney, County Tyrone, in 1814 | Roulston, William | Article in Journal | | 2010 |
| The parishes of Leckpatrick and Dunnalong : their place in history | Roulston, William J. | Monograph or Collective Volume | Ulster Local History Trust | 2000 |
| The plantation of Ulster map & pocket guide - the story of the English | Hunter, R. J. (Robert J.),Roulston, William J. | Monograph or Collective Volume | Ulster Historical Foundation | 2012 |
| The provision of Anglican places of worship in the parishes of Inishowen,1622-1733 | Roulston, William | Article in Journal | | 2018 |
| The provision, building and architecture of Anglican churches in the north of Ireland, 1600-1740 | Roulston, William J. | Thesis | | |
| The role of the parish in building and maintaining Anglican churches in the north of Ireland 1660-1740 | Roulston, William J. | Article in Book | | 2006 |
| The Scots in plantation Cavan, 1610-42 | Roulston, William J. | Article in Book | | 2009 |
| The Sinclairs of Belfast and the United States. Transatlantic business networks in the Victorian era | Roulston, William | Article in Journal | | 2016 |
| The Ulster plantation in the manor of Dunnalong, 1610-70 | Roulston, William J. | Article in Book | | 2000 |
| Thesis abstract : the provision, building and architecture of Anglican churches in the North of Ireland, 1600-1740 | Roulston, William J. | Article in Journal | | 2005 |
| Thomas Sinclair : 'Ulster's most prominent citizen' | Greenlee, GrahamLucy, GordonRoulston, William | Monograph or Collective Volume | Ulster-Scots Agency & Ulster Historical Foundation | 2016 |
| Three centuries of life in a Tyrone parish : a history of Donagheady from 1600 to 1900 | Roulston, William J. | Monograph or Collective Volume | Strabane History Society | 2010 |
| Trade and traders in plantation Ulster, c.1600–c.1650 | Roulston, William ; Scott, Brendan | Article in Journal | | 2022 |
| Transatlantic Lives: The Irish Experience in Colonial America | | Monograph or Collective Volume | Ulster Historical Foundation | 2019 |
| Welsh, Scottish and English settlement in County Monaghan in the Seventeenth and Early Eighteenth centuries | Roulston, William | Article in Journal | | 2011 |