West Pennant Hills is a suburb in the Hills District of Sydney, New South Wales, Australia. Located 21 km northwest of Sydney's central business district, the suburb falls within the local government areas of both The Hills Shire and Hornsby Shire, reflecting its position across municipal boundaries.
As part of the broader Hills District region, West Pennant Hills forms part of the outer northwestern suburbs of the Sydney metropolitan area. The suburb's dual local government administration indicates its location at the intersection of two significant local council jurisdictions in the greater Sydney region.