Siedlce County Powiat siedlecki
County
Flag Coat of arms
Location within the voivodeship
Division into gminas
Coordinates (Siedlce): 52°9′54″N 22°16′17″E / 52.16500°N 22.27139°E / 52.16500; 22.27139
Country	Poland
Voivodeship	Masovian
Seat	Siedlce
Gminas	Total 13 Gmina Domanice Gmina Korczew Gmina Kotuń Gmina Mokobody Gmina Mordy Gmina Paprotnia Gmina Przesmyki Gmina Siedlce Gmina Skórzec Gmina Suchożebry Gmina Wiśniew Gmina Wodynie Gmina Zbuczyn
Area
• Total	1,603.22 km2 (619.01 sq mi)
Population  (2019)
• Total	81,265
• Density	51/km2 (130/sq mi)
• Urban	1,788
• Rural	79,477
Car plates	WSI
Website	http://www.powiatsiedlecki.pl/

Siedlce County (Polish: powiat siedlecki) is a unit of territorial administration and local government (powiat) in Masovian Voivodeship, east-central Poland. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat is the city of Siedlce, although the city is not part of the county (it constitutes a separate city county). The only town in Siedlce County is Mordy, which lies 18 km (11 mi) east of Siedlce.

The county covers an area of 1,603.22 square kilometres (619.0 sq mi). As of 2019 its total population is 81,265, out of which the population of Mordy is 1,788 and the rural population is 79,477.^[1]

Apart from the city of Siedlce, Siedlce County is also bordered by Węgrów County and Sokołów County to the north, Siemiatycze County to the north-east, Łosice County and Biała Podlaska County to the east, Łuków County to the south, Garwolin County to the south-west, and Mińsk County to the west.

The county is subdivided into 13 gminas (one urban-rural and 12 rural). These are listed in the following table, in descending order of population.