As on October 2019; there are 12 test playing nations in the world. Ireland is the 12th test match playing nation which got this status on 11 May 2018 while Afghanistan was the 11th country which got test status on 14 June 2018.
Out of 12 test playing countries only 8 have scored a triple century in test matches while no player from Afghanistan, Bangladesh, Ireland and Zimbabwe has ever scored 300 runs.
There have been occasions when batsmen have been able to convert the double hundreds in triple hundreds. On 31 occasions, batsmen have crossed the 300 run mark in a Test innings.
Virender Sehwag (India), Donald Bradman (Australia), Brian Lara and Chris Gayle (West Indies) are the only batsmen to scored 300 plus score more than once in the test matches.
The fastes Test triple-century in terms of time (4 hours 48 minutes) was scored by the Wally Hammond from England in 1932–33.
List of Triple Centuries in Test Cricket Batsmen
| Batsman | Country | Runs | Date |
| David Warner | Australia | 335* | 30-Nov-19 |
| Karun Nair | India | 303* | 19-Dec-16 |
| Azhar Ali | Pakistan | 302 | 13-Oct-16 |
| Brendon McCullum | New Zealand | 302 | 18-Feb-14 |
| Kumar Sangakkara | Sri Lanka | 319 | 5-Feb-14 |
| Hashim Amla | South Africa | 311* | 19-Jul-12 |
| Michael Clarke | Australia | 329* | 3-Jan-12 |
| Chris Gayle | West Indies | 333 | 15-Nov-10 |
| Younis Khan | Pakistan | 313 | 21-Feb-09 |
| Virender Sehwag | India | 319 | 26-Mar-08 |
| Mahela Jayawardene | Sri Lanka | 374 | 27-Jul-06 |
| Chris Gayle | West Indies | 317 | 29-Apr-05 |
| Brian Lara | West Indies | 400* | 10-Apr-04 |
| Virender Sehwag | India | 309 | 28-Mar-04 |
| Matthew Hayden | Australia | 380 | 9-Oct-03 |
| Inzamam-ul-Haq | Pakistan | 329 | 1-May-02 |
| Mark Taylor | Australia | 334* | 15-Oct-98 |
| Sanath Jayasuriya | Sri Lanka | 340 | 2-Aug-97 |
| Brian Lara | West Indies | 375 | 16-Apr-94 |
| Graham Gooch | England | 333 | 26-Jul-90 |
| Lawrence Rowe | West Indies | 302 | 6-Mar-74 |
| Bob Cowper | Australia | 307 | 11-Feb-66 |
| John Edrich | England | 310* | 8-Jul-65 |
| Bob Simpson | Australia | 311 | 23-Jul-64 |
| Garfield Sobers | West Indies | 365* | 26-Feb-58 |
| Hanif Mohammad | Pakistan | 337 | 17-Jan-58 |
| Len Hutton | England | 364 | 20-Aug-38 |
| Donald Bradman | Australia | 304 | 20-Jul-34 |
| Wally Hammond | England | 336* | 31-Mar-33 |
| Donald Bradman | Australia | 334 | 11-Jul-30 |
| Andy Sandham | England | 325 | 3-Apr-30 |