Eivind Reiersen (11 June 1877 – 16 September 1947) was a Norwegian newspaper editor and politician for the Labour and Communist parties. He served one term as an MP, was deputy mayor of Skien, and edited the newspapers Fremover, Ny Dag, Bratsberg-Demokraten (a.k.a. Folkets Dagblad), Telemark Arbeiderblad, Telemark Kommunistblad and Rjukan Arbeiderblad.