Northern Illinois University does not consider test score (SAT and ACT scores) in admissions, even if applicants submitted it. Therefore, current year score is not available, but here we track the past test scores for reference.
SAT Scores Over Time
The 2024 SAT score is at Northern Illinois. Over the past 8 years, the average SAT score is 923 (25th percentile) and 1137 (75th percentile). Compared to similar schools, the submitted SAT scores are around national average at Northern Illinois.
The following table and chart illustrate the changes in SAT scores at Northern Illinois University since 2013.
*SAT Evidence-Based Reading and Writing replaces SAT critical reading and writing since year 2017.
**The SAT Writing score is excluded from the total scores for year from 2011 to 2016.
ACT Scores Over Time
The 2024 ACT score is at Northern Illinois. Over the past 8 years, the average ACT score of the last 8 years is 19 (25th percentile) and 25 (75th percentile). Compared to similar schools, the submitted ACT scores are around national average at Northern Illinois.
The following table and chart show the changes in ACT scores at Northern Illinois University since 2013.
| Year | Composite | English | Math |
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| 25th | 50th | 75th | 25th | 50th | 75th | 25th | 50th | 75th |
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| 2013-14 | 19 | 22 | 24 | 19 | 22 | 25 | 18 | 22 | 25 |
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| 2014-15 | 19 | 22 | 25 | 19 | 22 | 25 | 18 | 22 | 25 |
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| 2015-16 | 19 | 22 | 25 | 19 | 22 | 25 | 18 | 22 | 25 |
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| 2016-17 | 19 | 22 | 25 | 19 | 22 | 25 | 17 | 21 | 25 |
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| 2018-19 | 19 | 22 | 25 | 18 | 22 | 25 | 18 | 22 | 25 |
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| 2019-20 | 19 | 22 | 25 | 18 | 22 | 25 | 17 | 21 | 25 |
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| Average | 19 | 22 | 25 | 19 | 22 | 25 | 18 | 21 | 25 |
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