Wilno County[a] was a county with capital in Vilanus located in the Republic of Central Lithuania, and later de jure in Wilno Land, Second Polish Republic.

Between 1920 and 1922 it was a county in Republic of Central Lithuania, established in place of former Vilensky Uyezd, Vilna Governorate.

In 1922, following the incorporation of Central Lithuania into Poland, the county become a part of then established Wilno Land.

In 1921, the county had informally united with Troki County, and between 1923 and 1924 they had been formally transformed into Wilno-Troki County.

[1] In 1921, from the county was separated city of Vilanus, that was reformed into a separate county.