Olievenhoutbos Ext 21
Sub Place 799078003 from Census 2011
- Area
 - 0.14 km²
 - Population
 - 4,548 (31,711.91 per km²)
 - Households
 - 2,090 (14,572.98 per km²)
 
Gender
 | People | Percentage | 
|---|
| Male | 2,464 | 54.18% | 
| Female | 2,084 | 45.82% | 
Age
 | People | Percentage | 
|---|
| 0–4 | 565 | 12.43% | 
| 5–9 | 270 | 5.94% | 
| 10–14 | 179 | 3.94% | 
| 15–19 | 214 | 4.71% | 
| 20–24 | 770 | 16.94% | 
| 25–29 | 928 | 20.42% | 
| 30–34 | 606 | 13.33% | 
| 35–39 | 423 | 9.31% | 
| 40–44 | 232 | 5.10% | 
| 45–49 | 153 | 3.37% | 
| 50–54 | 92 | 2.02% | 
| 55–59 | 69 | 1.52% | 
| 60–64 | 22 | 0.48% | 
| 65–69 | 9 | 0.20% | 
| 70–74 | 6 | 0.13% | 
| 75–79 | 2 | 0.04% | 
| 80–84 | 2 | 0.04% | 
| 85+ | 3 | 0.07% | 
Population group
 | People | Percentage | 
|---|
| Black African | 4,490 | 98.75% | 
| Other | 25 | 0.55% | 
| Coloured | 22 | 0.48% | 
| Indian or Asian | 6 | 0.13% | 
| White | 4 | 0.09% | 
First language
 | People | Percentage | 
|---|
| Sepedi | 1,172 | 25.76% | 
| isiZulu | 881 | 19.37% | 
| Other | 511 | 11.23% | 
| isiNdebele | 406 | 8.93% | 
| Xitsonga | 367 | 8.07% | 
| Setswana | 340 | 7.47% | 
| Sesotho | 213 | 4.68% | 
| isiXhosa | 210 | 4.62% | 
| English | 188 | 4.13% | 
| Tshivenda | 126 | 2.77% | 
| SiSwati | 81 | 1.78% | 
| Afrikaans | 48 | 1.06% | 
| Sign language | 6 | 0.13% |