| Conventional Long Name: | Wilno-Troki County |
| Nation: | Wilno Land and Wilno Voivodeship |
| Subdivision: | County |
| Event1: | Informal unification of counties of Wilno Land|Wilno and Troki |
| Date Event1: | 1921 |
| Event2: | Formal establishemtn of the county |
| Date Event2: | 1923/1924 |
| Event3: | Soviet occupation of Poland |
| Date Event3: | 1939 |
| Life Span: | 1921–1939 (de facto) 1923/1924–1939 (de jure) |
| P1: | Wilno County, Wilno LandWilno County |
| P2: | Troki County |
| S1: | Lithuania |
| Flag S1: | Flag of Lithuania (1918–1940).svg |
| Image Map Caption: | Location within Wilno Land |
| Capital: | Vilnius (extrateritorially) |
| Government Type: | County |
| Membership Title1: | Country |
| Membership1: | Central Lithuania (de facto 1921–1922) Poland (de jure 1923/1924–1939, de facte 1922–1939) |
| Membership Title2: | District |
| Membership2: | Wilno Land (de jure 1923/1924–1926, de facte 1922–1926) |
| Membership Title3: | Voivodeship |
| Membership3: | Wilno Voivodeship (1926–1939) |
Wilno-Troki County was a county with capital in Vilnius located in Wilno Land, and later, Wilno Voivodeship, in Poland.[1] It originated from informal unification of administration, between the counties of Wilno and Troki, that existed from 1921 to 1922 within the Republic of Central Lithuania, and from 1922 to 1923 or 1924 in Poland. Between 1923 and 1924, two counties were officially joined to form one county, that until 1926 was located in Wilno Land, and from 1926 to 1939, in Wilno Voivodeship.[2]