Elfi Zinn (née Rost, born 24 August 1953 in Rathebur) is a German middle distance runner who specialised in the 800 metres.

In domestic competitions, she represented the sports club SC Neubrandenburg.

[1] Her personal best time was 1:55.60 minutes, achieved at the 1976 Summer Olympics.

This places her third on the German all-time list, only behind Sigrun Wodars and Christine Wachtel.

This article about an athletics Olympic medalist for Germany is a stub.