MI6, sing dikenal uga kanthi jeneng Dinas Intelijen Rahasia (Secret Intelligence Service, SIS), iku [[Dinas intelijen|badan intelijen]] èksternal [[Britania Raya]]. Dinas iki nyambut gawé ing sangisoré arahan Komite Intelijen Gabungan ("[[Joint Intelligence Committee]]", JIC), lan kerja sama karo Dinas Kaamanan ("Security Service", [[MI5]]), Markas Komunikasi Pamaréntah ("[[Government Communications Headquarters]]", GCHQ) lan Staf Intelijen Pertahanan ("[[Defence Intelligence Staff]]", DIS).