| Named By: | Von Huene in 1922 |
| Time Period: | Late Triassic - Early Jurassic, Rhaetian-Pliensbachian |
| Location: | Western Europe including, Belgium, England, Germany and Switzerland |
| Size: | Details uncertain |
| Diet: | Piscivore |
| Fossil(s): | Several specimens |
| Classification: | | Chordata | Reptilia | Ichthyosauria | Leptopterygiidae | |
| Also known as: | | Ichthyosaurus tenuirostris | Leptopterygius tenuirostris | |
Leptonectes is a genus of ichthyosaur that lived in the Late Triassic to Early Jurassic (Rhaetian - Pliensbachian). Fossils have been found in Belgium, England, Germany, and Switzerland.