Janko is a surname and given name.

Janko may also refer to:

Janko group, in mathematics Janko group J1 Janko group J2 Janko group J3 Janko group J4 Jankó keyboard Jankwa (or Janko), a Newar ritual

See also Janko Kráľ Park, a park in Bratislava's Petržalka borough