Robert Hans George Jahnke ONZM (born 1951) is a New Zealand artist and educator, well-known for his graphic and sculptural artwork.

He is a professor at Massey University, founding Toioho ki Āpiti in 1991, the Māori visual arts degree programme in New Zealand.

[7] In 1991 under Professor Mason Durie's direction, Jahnke started Toioho ki Āpiti, School of Māori Art at Massey University in Palmerston North.

[10][11] In developing the programme Jahnke describes changing the canons of "Euro-centric art education" for one that privileged a mātauranga Māori conceptual foundation.

Public artwork created includes the window design at the contemporary marae Rongomaraeroa in the Museum of New Zealand Te Papa Tongarewa, wall reliefs at the Wellington High Court and Giant Spinning Top (2003) in Wellington, and Nga Takerenui a Tamaki / Twin Hulls (2006) at the University of Auckland Tamaki Campus.

[9][15] Jahnke's artwork is held in the collections of The Museum of New Zealand Te Papa Tongarewa and the Auckland City Art Gallery.