| Jaroslav Kacmarcyk | |
| Birth Date: | 1885 |
| Birth Place: | Binczarowa, Kingdom of Galicia and Lodomeria, Austria-Hungary |
| Death Date: | 1944 |
| Nationality: | Lemko |
| Other Names: | Iaroslav Karchmarchyk, Jarosław Kaczmarczyk |
| Known For: | President of the Lemko-Rusyn Republic |
| President of the Lemko-Rusyn Republic | |
| Parents: | Teofil Kacmarcyk |
Doctor Jaroslav Kacmarcyk or Jarosław Kaczmarczyk, also spelled Iaroslav Karchmarchyk (1885–1944) was the head of the Lemko-Rusyn Republic from 1918 to 1920. He was tried by the Polish government for anti-Polish agitation on June 6, 1921, and was acquitted.[1]
He was born in Binczarowa, in the Kingdom of Galicia and Lodomeria (present-day Poland).