Search through records for Co. Laois from the general Directory of the Kingdom of Ireland, 1788 by Richard Lucas.
| Surname | Name | Occupation | Address |
| Baggs | Richard | Latin, Greek Academy | Portarlington |
| Berry | Mary | Spirit Merchant | Mountmellick |
| Bewley | Mungo | Linen, Cotton Manufacturer | Mountmellick |
| Bewley & Shannon | Female Boarding school | Mountmellick | |
| Blair | John | M.D. | Portarlington |
| Bonafaus | John | French Academy | Portarlington |
| Bouchants | Messrs | Ladies Boarding School | Portarlington |
| Brewer | Thomas | Saddler, Shoemaker | Mountmellick |
| Butler | Hannah | Flour, Toy Dealer | Mountmellick |
| Cantrell | Jacob | Vintner – Black Bull Inn | Mountmellick |
| Cavanagh | Thomas | Woolen Draper, Grocer | Portarlington |
| Church | Matthew | Breechesmaker, Glover | Mountmellick |
| Clark | Richard | Apothecary, Postmaster | Portarlington |
| Crawly | Laurence | Grocer, Liquor Dealer | Portarlington |
| Daily | Garret | Spirit Merchant | Portarlington |
| Darsy | John | Baker, Mason | Portarlington |
| Davis | Thomas | Boot, Shoemaker | Mountmellick |
| Deverall | Robert | Woolen Manufacturer, Cotton Manufacturer | Mountmellick |
| Dugdal | Thomas | Grocer, Woolen Manufacturer | Mountmellick |
| Flanagan | Michael | Grocer, Tobacconist | Mountmellick |
| Flanagan | Patrick | Tailor, Habitmaker | Portarlington |
| Fleming | George | Baker, Grocer | Portarlington |
| Fletcher | George | M.D. | Mountmellick |
| Gatchell | John | Linen, Woolen Draper, Soap Boiler, Chandler | Mountmellick |
| Gatchell | Jonathan | Woolcomber, Woolen Manufacturer | Mountmellick |
| Gatchell | William | Grocer, Linen, Woolen Manufacturer | Mountmellick |
| Goff | A. | Stocking Manufacturer | Portarlington |
| Goodbody | Richard | Woolcomber, Woolen Manufacturer | Mountmellick |
| Goodbody | Samuel | Woolman, Dealer | Mountmellick |
| Goodbody & Pim | Mercers, Woolen Drapers, Tanners, Chandlers, Tobacconists | Mountmellick | |
| Gouling | John | Grocer | Portarlington |
| Halpin | Nicholas | English Grammer School | Portarlington |
| Hanlon | Michael | Tanner | Portarlington |
| Harris | James | Stocking Manufacturer | Mountmellick |
| Harris | John | Stocking Manufacturer | Mountmellick |
| Harris | Richard | Grocer, Linen Draper | Portarlington |
| Haselem | Thomas | Weaver | Mountmellick |
| Hayes | Richard | Cotton Manufacturer | Mountmellick |
| Hill | Thomas | Carpenter, Builder | Portarlington |
| Hilton | John | Tanner | Mountmellick |
| Jackson | Nathaniel | Merchant, Woolcomber, Woolen Manufacturer | Mountmellick |
| Kelly | Elizabeth | Grocer, Haberdasher | Portarlington |
| Kelly | Peter | Vintner – Red Lion Inn | Portarlington |
| Kenny | Samuel | Vintner – Wheatsheaf Inn, Linen Draper, Haberdasher | Mountmellick |
| Lawler | Richard | Malster, Spirit Merchant | Mountmellick |
| Lennon | Andrew | Smith, Farrier | Portarlington |
| Lutterall | Alexander | Glazier, Painter | Portarlington |
| Martin | Jacob | Gov. of Principal School for Boys, Girls | Mountmellick |
| M’Avoy | Andrew | Bookseller, Stationer, Accomptant | Portarlington |
| M’Dermott | Patrick | Carpenter, Builder | Portarlington |
| Moor | Laurence | Vintner – Three Tons Inn | Mountmellick |
| Neal | John | Woolcomber, Woolen Manufacturer | Mountmellick |
| Neal | Nathaniel | Woolcomber, Woolen Manufacturer | Mountmellick |
| Neal | Samuel | Painter, Glazier | Mountmellick |
| Nowland | George | Haberdasher | Portarlington |
| Osborne | James | Apothecary | Portarlington |
| Owen | Edward | Grocer, Woolcomber | Mountmellick |
| Parsley | John | Surgeon | Portarlington |
| Pim | Jonathan | Soap Boiler, Chandler, Grocer, Tanner | Mountmellick |
| Powell | John | Haberdaher, Grocer | Portarlington |
| Powell | William | Grocer | Portarlington |
| Richardson | John | Postmaster, Apothecary | Mountmellick |
| Robertson | Wilcox | Attorney at Law | Mountmellick |
| Rowe | Arthur | Apothecary | Mountmellick |
| Shannon | William | Grocer, Malster | Mountmellick |
| Small | Mary | Grocer, Draper | Mountmellick |
| Star | Paul | Boot, Shoemaker | Mountmellick |
| Tarlton | Edward | Brewer | Portarlington |
| Taylor | Joseph | Clothier, Dyer | Mountmellick |
| Terson & Bauchant | Wine, Spirit Merchant | Portarlington | |
| Tracy | Dennis | M.D. | Mountmellick |
| Tracy | John | Vintner – George Inn | Mountmellick |
| Walton | John | Spirit, Wine Merchant | Portarlington |
| Walton | Jonathan | Vintner – Wheatsheaf Inn | Portarlington |
| Wilkinson | Richard | Linen, Woolen Draper | Portarlington |
| Willis | Thomas | French Academy | Portarlington |