| Inns | HS |
| 448-7 | 87 | Leinster Lightning (1) v Northern Knights | The Village, Malahide, Dublin | 2018 |
| 446 | 77 | North West Warriors (1) v Northern Knights | The Green, Comber | 2018 |
| 441 | 88 | Ireland Emerging Players (1) v West Indies Academy | Civil Service Cricket Club, Stormont, Belfast | 2024 |
| 440-9d | 93 | Northern Knights (1) v Leinster Lightning | The Village, Malahide, Dublin | 2018 |
| 350 | 65 | Ireland (1) v Scotland | Castle Avenue, Dublin | 2013 |
| 331-9d | 99 | Ireland (1) v Scotland | Castle Avenue, Dublin | 1981 |
| 331 | 73 | Kenya (1) v Ireland | Woodvale Road, Eglinton | 2009 |
| 316 | 95 | Ireland (1) v Hong Kong | Civil Service Cricket Club, Stormont, Belfast | 2016 |
| 314 | 93 | Scotland (1) v Ireland | Civil Service Cricket Club, Stormont, Belfast | 2007 |
| 310 | 91 | Scotland (1) v Ireland | College Park, Dublin | 1939 |
| 310-9d | 83 | Pakistan (1) v Ireland | The Village, Malahide, Dublin | 2018 |
| 304 | 71 | Australians (2) v CB Fry's XI | Woodbrook Cricket Club Ground, Bray | 1912 |
| 299 | 95 | Ireland (1) v Wales | Ormeau, Belfast | 1926 |
| 296 | 56 | SH Cochrane's XI (1) v Australians | Woodbrook Cricket Club Ground, Bray | 1909 |
| 296 | 87 | Ireland (1) v Marylebone Cricket Club | Observatory Lane, Rathmines, Dublin | 1936 |
| 296 | 87 | North West Warriors (2) v Leinster Lightning | Oak Hill Cricket Club, Oak Hill | 2017 |
| 295 | 85 | Marylebone Cricket Club (1) v Ireland | College Park, Dublin | 1928 |
| 295-7d | 90 | Strikers (1) v Raiders | The Village, Malahide, Dublin | 2024 |
| 294 | 81 | Ireland (2) v Scotland | College Park, Dublin | 1923 |
| 291 | 76 | Northamptonshire (1) v Dublin University | College Park, Dublin | 1926 |
| 291 | 73 | West Indians (2) v Ireland | College Park, Dublin | 1928 |
| 290 | 90 | Woodbrook Club and Ground (1) v South Africans | Woodbrook Cricket Club Ground, Bray | 1912 |
| 288 | 75 | Leinster Lightning (1) v Northern Knights | Civil Service Cricket Club, Stormont, Belfast | 2017 |
| 284-6d | 77 | Ireland (1) v Scotland | The Village, Malahide, Dublin | 1991 |
| 283 | 88 | Ireland Emerging Players (1) v West Indies Academy | The Green, Comber | 2024 |
| 282 | 86 | Ireland (1) v Scotland | The Meadow, Downpatrick | 1983 |
| 281 | 58 | Scotland (1) v Ireland | College Park, Dublin | 1925 |
| 280 | 95* | CB Fry's XI (1) v Australians | Woodbrook Cricket Club Ground, Bray | 1912 |
| 275-6d | 68 | Ireland (2) v Scotland | College Park, Dublin | 1925 |
| 274 | 81 | Leinster Lightning (1) v North West Warriors | Magheramason, Bready | 2017 |
| 274 | 92 | Ireland Emerging Players (2) v West Indies Academy | The Green, Comber | 2024 |
