Per genealogy library reference book, the following individuals owned an acre or more of property in Co. Monaghan, Ireland in the 1870s:

1. John Deighan, address Drumhillagh, Newbliss, owned 8 acres in Co. Monaghan valued at 5 shillings.
2. Anthony Denny, Reps of, address (In Chancery), owned 939 acres in Co. Monaghan valued at 733 pounds.
3. Owen Dignan, Reps of, address Ballybay, owned 41 acres in Co. Monaghan valued at 55 pounds 15 shillings.
4. Mary Jane Dixon, address Dundalk, owned 263 acres in Co. Monaghan valued at 203 pounds 5 shillings.
5. Anna Dobbin, address Dublin, owned 94 acres in Co. Monaghan valued at 73 pounds 5 shillings.
6. Messrs. Dobbs and Twigg, address Tramore, Waterford, owned 109 acres in Co. Monaghan valued at 81 pounds 10 shillings.
7. Right Rev. Dr. Donnelly, address Bishop's Residence, Monaghan, owed 229 acres in Co. Monaghan valued at 256 pounds 15 shillings.
8. Earl of Donoughmore, address Knocklofty, Clonmel, owned 373 acres in Co. Monaghan valued at 318 pounds 5 shillings.
9 . John Douglas, address Keady, owned 200 acres in Co. Monaghan valued at 170 pounds 5 shillings.
10. Hugh Duffy, address Gibraltar, Castleshane, owned 23 acres in Co. Monaghan valued at 26 pounds 15 shillings.
11. Patrick Duffy, address Annamacaneill, Dunraymond, owned 12 acres in Co. Monaghan valued at 11 pounds 15 shillings.
12. Rose Duffy, address Lisduff, Ballybay, owned 18 acres in Co. Monaghan valued at 10 pounds 10 shillings.
13. Martha Dunlop, no address given, owned 48 acres in Co. Monaghan valued at 34 pounds 15 shillings.
14. John Egan, address Cootehill, owned 12 acres in Co. Monaghan valued at 10 pounds.
15. Aaron Elliott, address Glenish, Dunraymond, owned 17 acres in Co. Monaghan valued at 12 pounds 5 shillings.
16. Robert F. Ellis, address Leagh Park, Wicklow, owned 830 acres in Co. Monaghan valued at 631 pounds.
17. Thomas C. Ellis, address Inch, Gorey, Co. Wexford, owned 341 acres in Co. Monaghan valued at 239 pounds.
18. James English, address Near Ballybay, owned 31 acres in Co. Monaghan valued at 25 pounds 15 shillings.
19. Francis Evans, address Carrickaderry, Clontibret, owned 5 acres in Co. Monaghan valued at 4 pounds 15 shillings.
20 . Samuel Robert B. Evatt, address Mountlouise, Smithboro', owned 1,241 acres in Co. Monaghan valued at 999 pounds 10 shillings.
21. C. J. Fache, no address given, owned 74 acres in Co. Monaghan valued at 35 pounds 5 shillings.
22 William Falls, address Carricklongfield, Aughnacloy, owned 424 acres in Co. Monaghan valued at 352 pounds 5 shillings.
23. Francis Faucett, address Belleek, owned 85 acres in Co. Monaghan valued at 86 pounds.
24. John Faucett, Reps of, address Dublin, owned 277 acres in Co. Monaghan valued at 248 pounds.
25. Isaiah Faulkner, address Closaghbeg, Rockcorry, owned 19 acres in Co. Monaghan valued at 14 pounds 10 shillings.
26. Joseph Fiddes, address Clenamally, Scotstown, owned 98 acres in Co. Monaghan valued at 78 pounds 15 shillings.
27. Edward Fiddis, Reps of, address Monaghan, owned 249 acres in Co. Monaghan valued at 135 pounds 5 shillings.
28. James Fiddis, address Hollywood, Scotstown, owned 313 acres in Co. Monaghan valued at 288 pounds.
29. Thomas Rowley Fisher, address Maybreath, Co. Meath, owned 194 acres in Co. Monaghan valued at 143 pounds 15 shillings.
30. Francis Fitzgerald, address Cloncorn, owned 136 acres in Co. Monaghan valued at 130 pounds 10 shillings.
31. John Fitzgerald, Reps of, address Castleblayney, owned 1,215 acres in Co. Monaghan valued at 788 pounds 10 shillings.
32. Thomas Fitzherbert, address Navan, owned 2,387 acres in Co. Monaghan valued at 1,877 pounds 12 shillings.
33. Peter Fitzpatrick, address Cormeen, Ballybay, owned 214 acres in Co. Monaghan valued at 177 pounds.
34. Thomas H. Fletcher, address Dublin, owned 127 acres in Co. Monaghan valued at 96 pounds 5 shillings.
35. Sir Geo. Forster, bart., address Coolderry, Carrickmacross, owned 2,062 acres in Co. Monaghan valued at 1,210 pounds.
36. Wm. Forster, Reps of, address Ballymure, Clones, owned 2,093 acres in Co. Monaghan valued at 2,024 pounds.