Viljandi County is one of 15 counties of Estonia. It is located in southern Estonia bordering Pärnu, Järva, Jõgeva, Tartu and Valga counties as well as Latvia.

Pärnu County is one of 15 counties of Estonia. It is situated in the south-western part of the country, on the coast of Gulf of Riga, and borders Lääne and Rapla counties to the north, Järva and Viljandi counties to the east, and Latvia to the south. In 2022 Pärnu County had a population of 85,705 – constituting 6.4% of the total population of Estonia.