| 255 | (205*,50) | A Balbirnie | Ireland v Netherlands | The Village, Malahide, Dublin | 2017 |
| 239 | (239*) | NVH Riches | Wales v Ireland | Ormeau, Belfast | 1926 |
| 231 | (231) | EC Joyce | Ireland v United Arab Emirates | The Village, Malahide, Dublin | 2015 |
| 216 | (9,207) | WTS Porterfield | North West v Leinster Cricket Union | Magheramason, Bready | 2018 |
| 209 | (65,144*) | SJS Warke | Ireland v Scotland | Castle Avenue, Dublin | 1985 |
| 203 | (67,136) | J Kerr | Scotland v Ireland | College Park, Dublin | 1927 |
| 195 | (178*,17) | J Kerr | Scotland v Ireland | College Park, Dublin | 1923 |
| 192 | (69,123) | Nizakat Khan | Hong Kong v Ireland | Civil Service Cricket Club, Stormont, Belfast | 2016 |
| 190 | (190*,0) | J Aitchison | Scotland v Ireland | College Park, Dublin | 1959 |
| 189 | (66,123*) | J Anderson | Leinster Cricket Union v Northern Cricket Union | The Green, Comber | 2018 |
| 186 | (137,49*) | SF Bergin | Ireland v Scotland | College Park, Dublin | 1959 |
| 186 | (186) | AC Botha | Ireland v Scotland | Civil Service Cricket Club, Stormont, Belfast | 2007 |
| 179 | (72,107) | AM Amla | South Africa Academy v Ireland | Castle Avenue, Dublin | 1999 |
| 171 | (87,84) | JA McCollum | Northern Cricket Union v Leinster Cricket Union | The Green, Comber | 2018 |
| 168 | (86,82) | JN Rhodes | Ireland v South Africa Academy | Pollock Park, Lurgan | 1999 |
| 168 | (28,140*) | JNK Shannon | Northern Cricket Union v Leinster Cricket Union | Civil Service Cricket Club, Stormont, Belfast | 2017 |
| 168 | (156,12) | EC Joyce | Leinster Cricket Union v North West | Oak Hill Cricket Club, Oak Hill | 2017 |
| 168 | (60,108) | WTS Porterfield | Ireland v Netherlands | The Village, Malahide, Dublin | 2017 |
| 167 | (167*) | EC Joyce | Leinster Cricket Union v Northern Cricket Union | Castle Avenue, Dublin | 2017 |
| 166 | (166) | WTS Porterfield | Ireland v Bermuda | Castle Avenue, Dublin | 2007 |
| 165 | (165) | NJ O'Brien | North West v Leinster Cricket Union | Sydney Parade, Dublin | 2018 |
| 163 | (124,39) | MC Parry | Ireland v Scotland | College Park, Dublin | 1925 |
| 158 | (40,118) | KJ O'Brien | Ireland v Pakistan | The Village, Malahide, Dublin | 2018 |
| 157 | (143*,14) | W Bardsley | Australians v SH Cochrane's XI | Woodbrook Cricket Club Ground, Bray | 1909 |
| 157 | (119*,38) | JA McCollum | Northern Cricket Union v Leinster Cricket Union | Civil Service Cricket Club, Stormont, Belfast | 2017 |
| 149 | (149) | D Denton | Yorkshire v Ireland | Woodbrook Cricket Club Ground, Bray | 1907 |
| 149 | (31,118*) | DF Watts | Scotland v Ireland | Castle Avenue, Dublin | 2004 |
| 148 | (148) | SR Thompson | North West v Leinster Cricket Union | Sydney Parade, Dublin | 2018 |
| 147 | (141,6*) | RC Blunt | Marylebone Cricket Club v Ireland | College Park, Dublin | 1934 |
| 146 | (146) | PR Stirling | Ireland v United Arab Emirates | The Village, Malahide, Dublin | 2015 |
| 146 | (86,60) | JNK Shannon | Northern Cricket Union v Leinster Cricket Union | Castle Avenue, Dublin | 2017 |