| Brahmadeva | |
| Birth Date: | 1060 |
| Death Date: | 1130 |
| Nationality: | Indian |
| Field: | Mathematician |
| Known For: | Trigonometry |
| Prizes: | Noble |
Brahmadeva (1060–1130) was an Indian mathematician. He was the author of Karanaprakasa, which is a commentary on Aryabhata's Aryabhatiya. Its contents deal partly with trigonometry and its applications to astronomy.