Nicolaas Hendrik Christiaan de Jong Theunissen (4 May 1867 – 9 November 1929) was a South African cricketer who played in one Test match in 1889. He became a minister of the Dutch Reformed Church.
| Format | Matches | Runs | Avg | 100s/50s | Top Score | Wickets | Bowl Avg | Best Bowling | Catches/St |
| Tests | 1 | 2 | 2.00 | 0/0 | 2* | 0 | – | – | 0/– |
| First-class | 3 | 66 | 22.00 | 0/0 | 49 | 20 | 12.35 | 7/41 | 1/– |
