Siedlce (Polish pronunciation: ['ɕɛdlt͡sɛ] ) (Yiddish: שעדליץ Shedlits) is a city in the Masovian Voivodeship in eastern Poland with 74,780 inhabitants (as of 2024).
The city is situated between two small rivers, the Muchawka and the Helenka, and lies along the European route E30, around 90 kilometres (56 mi) east of Warsaw. It is the fourth largest city of the Masovian Voivodeship, and the seat of the Roman Catholic Diocese of Siedlce. Siedlce is a local educational, cultural and sports center, with a university, a notable rugby club and two important museums. It also hosts a garrison of the Polish Armed Forces.