| Named By: | J. K. O'Connor, K.inQ. Gao & L. M. Chiappe in 2010 |
| Time Period: | Early Cretaceous, 122 Ma |
| Location: | China, Liaoning Province - Yixian Formation |
| Size: | Unavailable |
| Diet: | Insectivore |
| Fossil(s): | Almost complete individual preserved on a slab |
| Classification: | | Chordata | Aves | Yanornithiformes | Hongshanornithidae | |
Longicrusavis (meaning "long shin bird" in Latin) is an extinct genus of basal ornithuromorph bird within the family Hongshanornithidae. Remains have been found from the Lower Cretaceous Yixian Formation in Liaoning Province, China.