Grafenauer is a Slovenian surname related to the German toponym Grafenau.
Notable people with this surname include:
Bogo Grafenauer (1916–1995), Slovenian historian Irena Grafenauer (born 1957), Slovenian flute player Ivan Grafenauer (1880–1964), Slovenian literature historian Niko Grafenauer (born 1940), Slovenian author Stanko Grafenauer (1922–2010), Slovenian mining engineer and mineralogist