Siedlce is a city in eastern Poland with 76,585 inhabitants. Situated in the Masovian Voivodeship, previously the city was the capital of a separate Siedlce Voivodeship . Siedlce lies between two small rivers, the Muchawka and the Helenka, along European route E30. It is the fourth largest city of the Voivodeship, and the seat of a Roman Catholic Diocese of Siedlce. Siedlce is a local educational, cultural and business center.