| Piet Plessis | |
| Pushpin Map: | South Africa North West#South Africa |
| Coordinates: | -26.1667°N 49°W |
| Subdivision Type: | Country |
| Subdivision Name: | South Africa |
| Subdivision Type1: | Province |
| Subdivision Name1: | North West |
| Subdivision Type2: | District |
| Subdivision Name2: | Dr Ruth Segomotsi Mompati |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Kagisano/Molopo |
| Subdivision Type4: | Main Place |
| Established Title: | Established |
| Leader Title: | Councillor |
| Area Footnotes: | [1] |
| Area Total Km2: | 13.65 |
| Population Total: | 1655 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Racial makeup (2011) |
| Demographics1 Title1: | Black African |
| Demographics1 Info1: | 95.8% |
| Demographics1 Title2: | Coloured |
| Demographics1 Info2: | 1.8% |
| Demographics1 Title3: | Indian/Asian |
| Demographics1 Info3: | 0.2% |
| Demographics1 Title4: | White |
| Demographics1 Info4: | 2.2% |
| Demographics1 Title5: | Other |
| Demographics1 Info5: | 0.1% |
| Demographics Type2: | First languages (2011) |
| Demographics2 Title1: | Tswana |
| Demographics2 Info1: | 91.5% |
| Demographics2 Title2: | Afrikaans |
| Demographics2 Info2: | 4.1% |
| Demographics2 Title3: | English |
| Demographics2 Info3: | 2.1% |
| Demographics2 Title4: | Zulu |
| Demographics2 Info4: | 1.1% |
| Demographics2 Title5: | Other |
| Demographics2 Info5: | 1.2% |
| Timezone1: | SAST |
| Utc Offset1: | +2 |
| Postal Code Type: | Postal code (street) |
| Postal2 Code Type: | PO box |
| Postal2 Code: | 8621 |
| Area Code Type: | Area code |
| Area Code: | 053 |
Piet Plessis is a small town in the North West Province of South Africa. It lies adjacent to rural road R377. The nearest larger city, and business hub, is Vryburg which is about to the south. The Botswana border lies approximately north of Piet Plessis. It was founded in 1839 by a group of Trekboers led by Piet Plessis of Laingsburg, Western Cape. From 1969 it was the site of a MGM-29 Sergeant Ballistic Missile battery of the SADF, co located with three Infantry Companies of the 5 SAI, a Medium Artillery battery, and an SAAF Forward Radar and Signals Squadron.