Järva County (Estonian: Järva maakond or Järvamaa; German: Jerwen; Latin: Jervia) is one of 15 counties of Estonia. It is situated in the central part of the country and borders Lääne-Viru County to the east, Jõgeva County to the south-east, Viljandi County to the south, Pärnu County to the south-west, Rapla County to the west, and Harju County to the north. In January 2009, Järva County had a population of 29,940 – constituting 2.7% of the total population in Estonia. History. In the first centuries AD political and administrative subdivisions began to emerge.
https://en.wikipedia.org/wiki/J%C3%A4rva_County