| Index | Johannesburg | California | National |
| Average Test Scores | n/a | 43% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 8,308 | 79,221 |
| Total private schools | n/a | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
| Index | Johannesburg | California | National |
| Completed 8th grade | 100.0% | 81.1% | 84.3% |
| Completed high school | 100.0% | 79.8% | 83.0% |
| Completed some college | 100.0% | 61.5% | 59.4% |
| Completed associate degree | 26.3% | 39.8% | 38.5% |
| Completed bachelors | 0.0% | 32.0% | 30.3% |
| Completed masters | 0.0% | 11.9% | 11.5% |
| Completed professional degree | 0.0% | 3.9% | 3.3% |
| Completed doctorate | 0.0% | 1.6% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Johannesburg. Using the proficiency score averages, the average test scores for Johannesburg, CA schools is n/a. The average student to teacher ratio is n/a. In Johannesburg, CA, an average of 100.0% of students have completed 8th grade and an average of 100.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Johannesburg, CA | 48 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Chenega, AK | 48 | 50% | 4.2% |
| Clinchport, VA | 48 | 87% | 81.3% |
| Paynes Creek, CA | 47 | 50% | 4.2% |
| Interior, SD | 47 | 50% | 4.2% |
| Starkweather, ND | 49 | 45% | 6.3% |
| Johannesburg, CA | 48 | n/a |
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