Peter James de Lange (born 1966) is a New Zealand botanist at Unitec Institute of Technology.

Born and schooled in Hamilton, New Zealand, de Lange graduated from the University of Waikato as B.Sc.

He has a PhD from the University of Auckland, the subject of his thesis being the biosystematics of Kunzea ericoides (kānuka).

[1] From 1990 to 2017 de Lange worked as a threatened plant scientist in the Ecosystems and Species Unit of Research and Development in the New Zealand Department of Conservation.

In February 2021 a lichen, Amandinea delangei was also named in his honour based on specimens he had collected from Te Wakatehaua, Oneroa-o-Tohe (Ninety Mile Beach), Te Aupouri, Northland, North Island, New Zealand.