Charmhaven is a suburb of the Central Coast region of New South Wales, Australia.

It is part of the Central Coast Council local government area.

As of November 2010, with the revision of OMBSC 6 (Busways Central Coast) it was agreed that Coastal Liner (Now CDCNSW) would operate several Busways runs, 98 Blue Haven loop being one of them only during certain times of the day, OPAL cards can still be used on Coastal Liner services.

Charmhaven is located in the Budgewoi Ward of Central Coast Council.

Charmhaven was home to a Kellogg's snack and cereal plant, but it closed in 2014 and production moved to Thailand.