Nathan Peterson Havill (born 1972) is an American entomologist and evolutionary biologist.
Havill is a Research Entomologist with the United States Forest Service in Hamden, Connecticut and is internationally recognized on the phylogeny of Adelgidae.
Since 1996 Havill has been a member of the Entomological Society of America.
Since 2001, he has been a member of the Connecticut Entomological Society.
[1] His research focuses on the ecology and evolution of multi-trophic interactions and, in particular invasive pests, their natural enemies, and the impacted trees.