| Table 5 : Population by 5 - year age groups and sex | ||||||
| Area and Age | Total | Male | Female | |||
| Groups | Number | Percent | Number | Percent | Number | Percent |
| NEPAL | ||||||
| All ages | 18491097 | 100 | 9220974 | 100 | 9270123 | 100 |
| 0 - 04 Years | 2707352 | 14.6 | 1371225 | 14.9 | 1336127 | 14.4 |
| 05 - 09 Years | 2806133 | 15.2 | 1430265 | 15.5 | 1375868 | 14.8 |
| 10 - 14 Years | 2327286 | 12.6 | 1209803 | 13.1 | 1117483 | 12.1 |
| 15 - 19 Years | 1792527 | 9.7 | 878035 | 9.5 | 914492 | 9.9 |
| 20 - 24 Years | 1586763 | 8.6 | 729279 | 7.9 | 857484 | 9.2 |
| 25 - 29 Years | 1374409 | 7.4 | 648268 | 7.0 | 726141 | 7.8 |
| 30 - 34 Years | 1154301 | 6.2 | 552339 | 6.0 | 601962 | 6.5 |
| 35 - 39 Years | 1027247 | 5.6 | 516229 | 5.6 | 511018 | 5.5 |
| 40 - 44 Years | 842719 | 4.6 | 409992 | 4.4 | 432727 | 4.7 |
| 45 - 49 Years | 734162 | 4.0 | 374362 | 4.1 | 359800 | 3.9 |
| 50 - 54 Years | 598484 | 3.2 | 307446 | 3.3 | 291038 | 3.1 |
| 55 - 59 Years | 465957 | 2.5 | 250040 | 2.7 | 215917 | 2.3 |
| 60 - 64 Years | 431645 | 2.3 | 215479 | 2.3 | 216166 | 2.3 |
| 65 - 69 Years | 270472 | 1.5 | 141707 | 1.5 | 128765 | 1.4 |
| 70 - 74 Years | 183952 | 1.0 | 94230 | 1.0 | 89722 | 1.0 |
| 75 - 79 Years | 89966 | 0.5 | 46300 | 0.5 | 43666 | 0.5 |
| 80 - 84 Years | 58809 | 0.3 | 27927 | 0.3 | 30882 | 0.3 |
| 85 - 89 Years | 20725 | 0.1 | 10116 | 0.1 | 10609 | 0.1 |
| 90 - 94 Years | 9206 | 0.0 | 4152 | 5054 | 0.1 | |
| 95 + Years | 6459 | 2827 | 3632 | |||
| Not Stated | 2523 | 953 | 1570 | |||