| Index | Portland | Texas | National |
| Average Test Scores | 53% | 47% | 48% |
| Student/Teacher ratio | 17:1 | 14:1 | 16:1 |
| Total public schools | 6 | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Portland | Texas | National |
| Completed 8th grade | 87.5% | 79.3% | 84.3% |
| Completed high school | 86.1% | 77.8% | 83.0% |
| Completed some college | 64.3% | 57.3% | 59.4% |
| Completed associate degree | 34.0% | 34.9% | 38.5% |
| Completed bachelors | 23.7% | 28.1% | 30.3% |
| Completed masters | 6.9% | 9.6% | 11.5% |
| Completed professional degree | 2.0% | 2.6% | 3.3% |
| Completed doctorate | 0.6% | 1.1% | 1.3% |
There are a total of 6 public schools, n/a private schools and n/a post-secondary schools in Portland. Using the proficiency score averages, the average test scores for Portland, TX schools is 53%. The average student to teacher ratio is 17:1. In Portland, TX, an average of 87.5% of students have completed 8th grade and an average of 86.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Port Aransas, TX | 4,203 | 70% | 45.1% |
| Corpus Christi, TX | 326,332 | 47% | 2.7% |
| Sinton, TX | 5,389 | 46% | 4.2% |
| Ingleside, TX | 9,768 | 46% | 5.2% |
| Aransas Pass, TX | 9,269 | 43% | 11.5% |
| Portland, TX | 17,807 | 53% | 11.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Albert Lea, MN | 17,804 | 44% | 8.2% |
| Amsterdam, NY | 17,823 | 37% | 22.1% |
| El Dorado, AR | 17,826 | 42% | 12.4% |
| Colonia, NJ | 17,782 | 52% | 8.5% |
| West Columbia, SC | 17,782 | 45% | 6.9% |
| Portland, TX | 17,807 | 53% | 11.0% |
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