| Index | Diamond Bar | California | National | 
| Average Test Scores | 67% | 43% | 48% | 
| Student/Teacher ratio | 23:1 | 20:1 | 16:1 | 
| Total public schools | 11 | 8,308 | 79,221 | 
| Total private schools | 7 | 3,438 | 24,874 | 
| Total post-secondary schools | n/a | 1,085 | 7,963 | 

 
				
Why stop at city-to-city? With Local Insights, you can compare neighborhoods, zip codes, or even exact addresses. Access 300+ hyperlocal data points—from schools and crime to housing and amenities—to see which area is the better fit.
 
				| Index | Diamond Bar | California | National | 
| Completed 8th grade | 91.4% | 81.1% | 84.3% | 
| Completed high school | 91.1% | 79.8% | 83.0% | 
| Completed some college | 77.8% | 61.5% | 59.4% | 
| Completed associate degree | 59.0% | 39.8% | 38.5% | 
| Completed bachelors | 50.7% | 32.0% | 30.3% | 
| Completed masters | 17.2% | 11.9% | 11.5% | 
| Completed professional degree | 5.7% | 3.9% | 3.3% | 
| Completed doctorate | 2.0% | 1.6% | 1.3% | 
There are a total of 11 public schools, 7 private schools and n/a post-secondary schools in Diamond Bar. Using the proficiency score averages, the average test scores for Diamond Bar, CA schools is 67%. The average student to teacher ratio is 23:1. In Diamond Bar, CA, an average of 91.4% of students have completed 8th grade and an average of 91.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. | 
| Los Alamitos, CA | 11,521 | 82% | 70.1% | 
| Arcadia, CA | 57,053 | 74% | 53.2% | 
| Yorba Linda, CA | 68,103 | 72% | 50.3% | 
| Cypress, CA | 49,137 | 71% | 47.5% | 
| Walnut, CA | 29,764 | 70% | 44.9% | 
| Diamond Bar, CA | 55,870 | 67% | 39.8% | 
| City | Population | Avg. Test Scores | National Avg. | 
| Commerce City, CO | 55,891 | 30% | 37.0% | 
| New Brunswick, NJ | 55,992 | 27% | 43.7% | 
| Pocatello, ID | 56,016 | 50% | 4.5% | 
| Tinley Park, IL | 56,082 | 46% | 3.5% | 
| Dearborn Heights, MI | 55,630 | 40% | 17.4% | 
| Diamond Bar, CA | 55,870 | 67% | 39.8% |