Forty-five percent--1,480,469 students--of the 2009 high school graduating class took the ACT. The average composite score was a 21.1 in 2009. Of 2009 test-takers, 668,165 (or 45%) were males, 808,097 (or 55%) were females, and 4,207 (or 0.3%) did not report a gender. Nationwide, 638 students who reported that they would graduate in 2009 received the highest ACT composite score of 36.
The following is based on official ACT ACT-SAT concordance chart ACT percentiles are calculated on the basis of the percent of test takers scoring the same score or a lower one, not (as is the case for many other assessments) only the percent scoring lower.
| 2380-2400 | 36 | 99% |
| 2290-2370 | 35 | 99% |
| 2220-2280 | 34 | 99% |
| 2140-2210 | 33 | 99% |
| 2080-2130 | 32 | 98% |
| 2020-2070 | 31 | 97% |
| 1980-2010 | 30 | 95% |
| 1920-1970 | 29 | 93% |
| 1860-1910 | 28 | 91% |
| 1800-1850 | 27 | 88% |
| 1740-1790 | 26 | 85% |
| 1680-1730 | 25 | 80% |
| 1620-1670 | 24 | 75% |
| 1560-1610 | 23 | 69% |
| 1510-1550 | 22 | 62% |
| 1450-1500 | 21 | 55% |
| 1390-1440 | 20 | 48% |
| 1330-1380 | 19 | 41% |
| 1270-1320 | 18 | 34% |
| 1210-1260 | 17 | 28% |
| 1140-1200 | 16 | 21% |
| 1060-1130 | 15 | 16% |
| 990-1050 | 14 | 11% |
| 910-980 | 13 | 6% |
| 820-900 | 12 | 3% |
| 750-810 | 11 | 1% |