白嘴端燕鸥（学名：Sterna sandvicensis），又名桑氏燕鸥，为鸥科燕鸥属下的一个种。

The Sandwich tern (Thalasseus sandvicensis) is a seabird of the tern family, Sternidae. It is very closely related to the lesser crested tern (T. bengalensis), Chinese crested tern (T. bernsteini), Cabot's tern (T. acuflavidus), and elegant tern (T. elegans) and has been known to interbreed with the lesser crested.