Among Alaskian natives the sudden infant death syndrome (SIDS) occurs at a rate somewhat less than that reported for native Americans indigenous to temperate latitudes. Cases occurred in both the arctic and subarctic regions of the state and among all but one of the ethnically distinct native population groups. No striking male predisposition was evident. These findings are, in general, similar to previously reported accounts from the states of California and Washington. Any theory of SIDS epidemiogenesis must take into account its wide geoethnic and peculiar sex distribution.