| Named By: | Samuel Wendell Williston in 1902 |
| Time Period: | Late Cretaceous, 93.5-70.6 Ma |
| Location: | Canada, Saskatchewan - Bearpaw Formation. USA, Kansas - Smokey Hill Chalk & Fort Hays Limestone, Utah - Tropic Shale |
| Size: | Up to 3 meters long |
| Diet: | Piscivore |
| Fossil(s): | Several specimens, some almost complete |
| Classification: | | Chordata | Reptilia | Sauropterygia | Plesiosauria | Plesiosauroidea | Cryptoclidia | Leptocleidia | Polycotylidae | |
Dolichorhynchops is an extinct genus of polycotylid plesiosaur from the Late Cretaceous (early Turonian to late Campanian stage) of North America, containing three species, D. osborni, D. bonneri and D. tropicensis, as well as a questionably referred fourth species, D. herschelensis. Dolichorhynchops was an oceangoing prehistoric reptile. Its Greek generic name means "long-nosed face".