| Intro | South African banker |
| Was | Businessperson |
| From | South Africa |
| Type | Business |
| Gender | male |
| Birth |
1877 |
| Death |
1947 |
Johannes Postmus (1877 – 1947) was the second Governor of the South African Reserve Bank. His term of office was from 1 January 1932 until 30 June 1945. He was succeeded by Michiel Hendrik de Kock.