Eltham is a small town in southern Taranaki, New Zealand with a population of around 2100 people.

Eltham is located 50 km from the city of New Plymouth, and is to the southwest of both it and the volcanic cone of Mount Taranaki (Egmont).

The town's main industry is cheese production, with many of Mainland Cheese 's specialty range (such as feta and Camembert) produced in the town. Cheese has been used as a central theme in the town, with the town's sign and several town features shaped and painted to imitate cheese. Eltham's other main industry is the Riverlands freezing works. The historian Ronald Syme is perhaps its best-known native.