Farming and fruit-growing locality on the upper reaches of the Kaipara River, southeast of Helensville. The warm, well-drained rolling countryside around Waimāuku has many vineyards. These were established by Croatian settlers after they left the worked-out gumfields. Today five labels dominate winemaking in the area: Matua Valley, Nobilo, Kumeū River, Coopers Creek and Selak.

Meaning of place name
Wai: stream; mauku: small ferns. It is said that when the stream was in flood, the cabbage trees showed only their crowns above the water, and looked like ferns.