| Magnus Celsius | |
| Birth Date: | 1621 1, df=yes |
| Birth Place: | Alfta, Sweden |
| Death Place: | Uppsala, Sweden |
| Nationality: | Swedish |
| Spouse: | Sara Celsius |
| Children: | Nils Celsius Johan Celsius Catharina Celsia Olof Celsius, Sr. Barbro Celsius |
| Field: | Astronomy, Mathematics |
Magnus Celsius (16 January 1621 – 5 May 1679) was a Swedish astronomer and mathematician, decipherer of the staveless runes. His grandson was Anders Celsius.[1]
He was the father of Olof Celsius, Nils Celsius and Johan Celsius.