Online records
- Census etc.
- 1659: Pender's "Census"
- Freeholders: 1758-1775
- Church records
- Roman Catholic:
- Aghaboe, Baptisms, 1797-1880
- Roman Catholic:
- Tithe Books:
- Local history: The French Church, Portarlington
- Gravestone inscriptions: Rathsaran
- Directories
- Pigot's 1824 City of Dublin and Hibernian Provincial Directory: Maryborough (Portlaoise)