| Christian Ingerslev Baastrup | |
| Birth Date: | 24 January 1885 |
| Birth Place: | Copenhagen, Denmark |
| Death Place: | Copenhagen, Denmark |
| Nationality: | Danish |
| Fields: | Medicine |
| Workplaces: | Rigshospitalet |
| Alma Mater: | University of Copenhagen |
| Known For: | Baastrup's sign |
Christian Ingerslev Baastrup (24 January 1885, in Copenhagen – 24 October 1950, in Copenhagen) was a Danish physician specializing in radiology. The Baastrup's sign is named after him.