Lääne-Viru County is one of 15 counties of Estonia. It is in northern Estonia, on the south coast of the Gulf of Finland. In Estonian, lääne means western and ida means east or eastern. Lääne-Viru borders Ida-Viru County to the east, Jõgeva County to the south, and Järva and Harju counties to the west. In January 2013, Lääne-Viru County had a population of 58,806: 4.5% of the population in Estonia.

Ida-Viru County is one of 15 counties of Estonia. It is the most north-eastern part of the country. The county contains large deposits of oil shale - the main mineral mined in Estonia. Oil shale is used in the production of shale oil and in thermal power plants. The capital of the county is the town of Jõhvi which is administratively united with the Jõhvi Parish; nevertheless, Narva is the largest town in the county in terms of population and at the same time the third largest city in Estonia after Tallinn and Tartu.