| Index | Colusa | California | National |
| Average Test Scores | 47% | 43% | 48% |
| Student/Teacher ratio | 14:1 | 20:1 | 16:1 |
| Total public schools | 8 | 8,308 | 79,221 |
| Total private schools | 1 | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
| Index | Colusa | California | National |
| Completed 8th grade | 72.4% | 81.1% | 84.3% |
| Completed high school | 70.5% | 79.8% | 83.0% |
| Completed some college | 54.2% | 61.5% | 59.4% |
| Completed associate degree | 28.9% | 39.8% | 38.5% |
| Completed bachelors | 16.1% | 32.0% | 30.3% |
| Completed masters | 4.1% | 11.9% | 11.5% |
| Completed professional degree | 1.7% | 3.9% | 3.3% |
| Completed doctorate | 0.2% | 1.6% | 1.3% |
There are a total of 8 public schools, 1 private schools and n/a post-secondary schools in Colusa. Using the proficiency score averages, the average test scores for Colusa, CA schools is 47%. The average student to teacher ratio is 14:1. In Colusa, CA, an average of 72.4% of students have completed 8th grade and an average of 70.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Grimes, CA | 462 | 50% | 4.2% |
| Sutter, CA | 2,789 | 38% | 20.5% |
| Arbuckle, CA | 3,368 | 38% | 21.9% |
| Maxwell, CA | 1,256 | 37% | 22.6% |
| Williams, CA | 5,284 | 35% | 26.6% |
| Colusa, CA | 6,111 | 47% | 2.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Childress, TX | 6,109 | 58% | 19.8% |
| East Flat Rock, NC | 6,108 | 48% | 0.3% |
| Manistee, MI | 6,116 | 40% | 16.7% |
| Thompson's Station, TN | 6,116 | 60% | 25.4% |
| Hudson, NY | 6,103 | 48% | = 100 |
| Colusa, CA | 6,111 | 47% | 2.6% |
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