| Named By: | Roger B. J. Benson, Mark Evans and Patrick S. Druckenmiller in 2012 |
| Time Period: | Early Jurassic, 199.6-198 Ma |
| Location: | England, Somerset - Blue Lias Formation |
| Size: | Roughly About 2 meters long for the holotype |
| Diet: | Piscivore |
| Fossil(s): | (NHMUK 14550) Post cranial skeleton missing parts of the limbs and the end of the tail. Partial posterior (rear) of the skull also known. A second specimen is also known but uncatalogued at the time of writing |
| Classification: | | Chordata | Reptilia | Sauropterygia | Plesiosauria | Rhomaleosauridae | |
Avalonnectes is an extinct genus of small-bodied rhomaleosaurid known from the Early Jurassic period (most likely earliest Hettangian stage) of the United Kingdom. It contains a single species, A. arturi.