Jankowice Wielkie is a village in the administrative district of Gmina Olszanka, within Brzeg County, Opole Voivodeship, in south-western Poland.
The settlement os located in the historic Lower Silesia region, approximately south-west of Olszanka, south of Brzeg, and west of the regional capital Opole.
The name of the village is of Polish origin and comes from the given name Janek or Janko, a diminutive of Jan (John).
In the final stages of World War II, in January 1945, a German-organized death march of Allied prisoners of war from the Stalag Luft 7 POW camp passed through the village.