| S/N | Ethnicity | Pop (2009) | Pop % | Students’ % |
| 1 | Kikuyu | 6,622,576 | 17.7 | 37.8 |
| 2 | Kamba | 3,893,157 | 10.4 | 13 |
| 3 | Luo | 4,044,440 | 10.8 | 12 |
| 4 | Luhya | 5,338,666 | 14.2 | 10 |
| 5 | Kalenjin | 4,967,328 | 13.3 | 8 |
| 6 | Meru | 1,658,108 | 4.4 | 7 |
| 7 | Kisii | 2,205,669 | 5.9 | 4 |
| 9 | Embu | 324,092 | 0.9 | 3 |
| 10 | Others | 273,519 | 22.4 | 5.2 |
| Total | 31,288,129 | 83.5 | 100 | |