Diéké, Djécké or Diecke is a town and sub-prefecture in the Yomou Prefecture in the Nzérékoré Region of south-eastern Guinea.
It is near the very large Simandou iron ore mines.
Coordinates: 07°20′54″N 08°57′15″W / 7.34833°N 8.95417°W / 7.34833; -8.95417