Gmina Sienno is a rural gmina (administrative district) in Lipsko County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Sienno, which lies approximately south-west of Lipsko and south of Warsaw.
The gmina covers an area of , and as of 2006 its total population is 6,377.
Gmina Sienno contains the villages and settlements of Adamów, Aleksandrów, Aleksandrów Duà ¼y, Bronisà Âawów, Dàbrówka, DÃÂbowe Pole, Eugeniów, Gozdawa, Hieronimów, Janów, Jaworska Wola, Kadà Âubek, Karolów, Kochanówka, Krzyà ¼anówka, Leà Âniczówka, Ludwików, Nowa Wieà Â, Nowy Olechów, Osówka, Piasków, Praga Dolna, Praga Górna, Sienno, Stara Wieà Â, Stary Olechów, Tarnówek, Trzemcha Dolna, Trzemcha Górna, Wierzchowiska Drugie, Wierzchowiska Pierwsze, Wodàca, WyglÃÂdów, Wygoda and Zapusta.
Gmina Sienno is bordered by the gminas of Baà Âtów, Bodzechów, Brody, Ciepielów, Kunów, Lipsko, Rzeczniów and Tarà Âów.
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