Yap or Wa'ab () classically refers to an island—the Yap Main Islands—located in the Caroline Islands of the western Pacific Ocean, and a part of the Federated States of Micronesia. The name "Yap" in recent years has come to also refer to the state within the Federated States of Micronesia, inclusive of the Yap Main Islands and its various outer islands.

In human genetics, Haplogroup DE is a human Y-chromosome DNA haplogroup. It is defined by the single nucleotide polymorphism (SNP) mutations, or UEPs, M1(YAP), M145(P205), M203, P144, P153, P165, P167, P183.

Yap is an island in the Caroline Islands of the western Pacific Ocean, part of Yap State in the Federated States of Micronesia.