Straumfjörður (Icelandic), or Straumfjǫrðr (Old Norse), sometimes anglicised to Straumsfjordr, Straumfjordr, Straumsfjord or Straumfjord, is according to the Sagas of Icelanders a fjord in Vinland where Thorfinn Karlsefni set up a temporary settlement. It is described in the Saga of Erik the Red, but not in the Greenland saga. Its name translates to "Current-fjord", "Stream-fjord" or "Tide-fjord".
Two somewhat different versions of the travels of Karlsefni appear in the sagas; they are found in the Hauksbók and the Flateyjarbók. They tell that Straumsey (Current-isle) lies at the mouth of Straumfjörð; this is an island with an extreme density of birds.