| Koster | |
| Pushpin Map: | South Africa North West#South Africa |
| Coordinates: | -25.8667°N 80°W |
| Subdivision Type: | Country |
| Subdivision Name: | South Africa |
| Subdivision Type1: | Province |
| Subdivision Name1: | North West |
| Subdivision Type2: | District |
| Subdivision Name2: | Bojanala Platinum |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Kgetlengrivier |
| Subdivision Type4: | Main Place |
| Established Title: | Established |
| Government Type: | Municipal Council |
| Leader Party: | ANC |
| Leader Title: | Mayor |
| Area Footnotes: | [1] |
| Area Total Km2: | 18.22 |
| Population Total: | 2342 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Racial makeup (2011) |
| Demographics1 Title1: | Black African |
| Demographics1 Info1: | 25.6% |
| Demographics1 Title2: | Coloured |
| Demographics1 Info2: | 1.7% |
| Demographics1 Title3: | Indian/Asian |
| Demographics1 Info3: | 9.6% |
| Demographics1 Title4: | White |
| Demographics1 Info4: | 62.4% |
| Demographics1 Title5: | Other |
| Demographics1 Info5: | 0.8% |
| Demographics Type2: | First languages (2011) |
| Demographics2 Title1: | Afrikaans |
| Demographics2 Info1: | 72.9% |
| Demographics2 Title2: | English |
| Demographics2 Info2: | 13.9% |
| Demographics2 Title3: | Tswana |
| Demographics2 Info3: | 9.5% |
| Demographics2 Title4: | Other |
| Demographics2 Info4: | 8.1% |
| Timezone1: | SAST |
| Utc Offset1: | +2 |
| Postal Code Type: | Postal code (street) |
| Postal Code: | 0348 |
| Postal2 Code Type: | PO box |
| Postal2 Code: | 0348 |
| Area Code Type: | Area code |
| Area Code: | 014 |
Koster is a small farming town situated on the watershed between the Orange and Limpopo Rivers in North West Province of South Africa.
The town was proclaimed in 1913 and named after Bastiaan Koster, the original farm owner. Koster means "church sexton".
Town 58 km south-west of Rustenburg and 72 km west-north-west of Magaliesburg. It was founded on the farm Kleinfontein in 1913, and has been administered by a village council since January 1931. Said to have been named either after Dr Herman Jacob Coster (1866–1899), State Attorney of the South African Republic, after its surveyor, or after Bastiaan Hendricus Koster, owner of the farm Kleinfontein. The latter explanation seems most plausible.[2]
The Elands River, the Koster River and the Mooi River have their sources near the town.[3]
| Notes: | Granted by the Administrator of the Transvaal, 31 August 1966.[4] |
| Escutcheon: | Vert two interlaced chevronels Argent in chief a lion rampant Or armed and langued Gules. |
| Crest: | A duiker's head and neck couped Proper. |
| Mantling: | Or and Vert. |
| Motto: | Eendrag Bring Voorspoed |
Heine-Lize Becker