Valentine is a suburb of the City of Lake Macquarie in New South Wales, Australia, and is regarded as a part of the Greater Newcastle district.

The suburb is 20 kilometres (12 mi) from Newcastle's central business district situated along the eastern shoreline of Lake Macquarie.

The first holiday cottage was built in the late 1920s but there being no usable road, no water, electricity or sewerage, development was slow.

A ferry provided holiday makers with access from Speers Point and a small shop was open on weekends.

Because the only access was by water, most of the houses were built on or near the foreshore adjacent to Dilkera Avenue (an aboriginal word meaning "by the shore").