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