| Named By: | G.R. Wieland in 1895 |
| Time Period: | Late Cretaceous, 80.5 Ma |
| Location: | USA, South Dakota and Wyoming |
| Size: | 4 meter long, 4.9 meters wide |
| Diet: | Probably soft bodied organisms like jellyfish and cephalopods |
| Fossil(s): | Few specimens |
| Classification: | | Chordata | Reptilia | Sauropsida | Testudines | Cryptodira | Protostegidae | |
Archelon (from Greek arkhelon meaning ruler turtle) is a genus of extinct sea turtles, the largest genus of sea turtles that has ever been documented, and the second-heaviest turtles documented behind Stupendemys.