Jerwen County

Jerwen County (Kreis Jerwen or Kreis Weissenstein, Järva kreis or Paide kreis, Вейсенштейнскій/Еервенскій уѣздъ) was one of the four counties of the Russian Empire located in the Governorate of Estonia. It was situated in the central part of the governorate (in present-day northern Estonia). Its capital was Paide (Weissenstein). The territory of Jerwen County corresponds to most of present-day Järva County and small parts of Lääne-Viru and Rapla counties.

Demographics
At the time of the Russian Empire Census of 1897, Jerwen County had a population of 52,673. Of these, 96.7% spoke Estonian, 2.2% German, 0.8% Russian, 0.1% Yiddish and 0.1% Latvian as their native language.