Olav Eysteinson Fjærli (March 25, 1883 – January 29, 1947) was a Norwegian politician for the Liberal Party, representing them in the Parliament of Norway from 1919 to 1933.

Fjærli was born in Krognes in the former municipality of Valsøyfjord in Møre og Romsdal county, Norway.

[1][2] He was the son of the farmer and sergeant Esten Fjærli (1850–1900) and Marit Krognes (1853–1938).

[3] On January 10, 1931 he became the head of the State Smallholders Teachers School at Hvalstad in municipality of Asker.

During his first three-year term he represented the single-member district of Romsdal and was assigned to economic committee no.