30 July] 1881 – 15 February 1920) was an Estonian[1][2] professional Greco-Roman and free-style wrestling world champion of the early 20th century.

Aberg was born in Kolga Manor, Harju County, Governorate of Estonia, Russian Empire.

Together with Lurich he came back via Japan and China to Russia in 1917 and arrived in Estonia in autumn.

They participated in a wrestling tournament in Tallinn that remained unfinished due to the approach of the German troops.

The international Aleksander Aberg Memorial in Greco-Roman wrestling has been held in Estonia since 1960.