| Index | Black Diamond | Washington | National |
| Average Test Scores | 62% | 48% | 49% |
| Student/Teacher ratio | 19:1 | 20:1 | 16:1 |
| Total public schools | 2 | 1,991 | 79,221 |
| Total private schools | n/a | 548 | 24,874 |
| Total post-secondary schools | n/a | 147 | 7,963 |
| Index | Black Diamond | Washington | National |
| Completed 8th grade | 90.6% | 87.5% | 84.3% |
| Completed high school | 89.9% | 86.6% | 83.0% |
| Completed some college | 64.0% | 67.7% | 59.4% |
| Completed associate degree | 38.0% | 43.3% | 38.5% |
| Completed bachelors | 28.2% | 33.6% | 30.3% |
| Completed masters | 11.4% | 12.3% | 11.5% |
| Completed professional degree | 3.2% | 3.6% | 3.3% |
| Completed doctorate | 2.1% | 1.5% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in Black Diamond. Using the proficiency score averages, the average test scores for Black Diamond, WA schools is 62%. The average student to teacher ratio is 19:1. In Black Diamond, WA, an average of 90.6% of students have completed 8th grade and an average of 89.9% have completed high school.
| City, State | Population | Avg. Test Scores | National Avg. |
| Maple Valley, WA | 25,093 | 73% | 49% |
| Hobart, WA | 6,474 | 73% | 47% |
| Newcastle, WA | 11,189 | 73% | 47% |
| Tanner, WA | 1,090 | 72% | 45% |
| Lake Tapps, WA | 13,030 | 69% | 40% |
| Black Diamond, WA | 4,321 | 62% | 27% |
| City, State | Population | Avg. Test Scores | National Avg. |
| Magnolia, NJ | 4,321 | 31% | 37% |
| Amite City, LA | 4,321 | 43% | 12% |
| North Kansas City, MO | 4,321 | 49% | 0% |
| Kensington Park, FL | 4,320 | 46% | 7% |
| Louisburg, KS | 4,323 | 47% | 5% |
| Black Diamond, WA | 4,321 | 62% | 27% |
Here are the best places to live in Washington
These are the 10 most affordable cities in Washington
See the best places to live in & around Black Diamond
Top 10 cities in Washington with the best education system