Oikos is a monthly peer-reviewed scientific journal covering research in the field of ecology.

It is published by Wiley-Blackwell on behalf of the Nordic Society Oikos.

The journal was established in 1949 as Oikos: Acta Oecologica Scandinavica, together with the Nordic Society Oikos, to provide a vehicle for publishing in the growing field of ecology.

In the 1970s, the scope was narrowed to studies with relevance to the progress of theory in ecology.

Between 2007 and 2014, the subject editors made nominations for an annual award given to a world-leading ecologist.