Eero Aleksander Nelimarkka (10 October 1891 – 27 January 1977) was a Finnish painter.

He is best known for depicting the flat landscapes of Ostrobothnia known as lakeus but he also produced portraits of notable Finns and family members.

In 1964 he built the Nelimarkka Museum on his father's farm at Alajärvi in southern Ostrobothnia.

Its core collection of some 1700 works is owned by the Nelimarkka Foundation.

[5] Antti Nelimarkka's daughter is artist Riitta Nelimarkka-Seeck, mother of writer Max Seeck.