| Gmina Sienno | |
| Other Name: | Sienno Commune |
| Settlement Type: | Gmina |
| Total Type: | Total |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Masovian |
| Subdivision Type2: | County |
| Subdivision Name2: | Lipsko |
| Area Total Km2: | 147.15 |
| Population Total: | 6377 |
| Population As Of: | 2006 |
| Population Density Km2: | auto |
| Coor Pinpoint: | Sienno |
| Coordinates: | 51.0894°N 21.4767°W |
| Seat: | Sienno |
| Website: | http://www.sienno.pl/ |
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 15km (09miles) south-west of Lipsko and 1300NaN0 south of Warsaw.
The gmina covers an area of 147.15km2, and as of 2006 its total population is 6,377.
Gmina Sienno contains the villages and settlements of Adamów, Aleksandrów, Aleksandrów Duży, Bronisławów, Dąbrówka, Dębowe Pole, Eugeniów, Gozdawa, Hieronimów, Janów, Jaworska Wola, Kadłubek, Karolów, Kochanówka, Krzyżanówka, Leśniczówka, Ludwików, Nowa Wieś, Nowy Olechów, Osówka, Piasków, Praga Dolna, Praga Górna, Sienno, Stara Wieś, Stary Olechów, Tarnówek, Trzemcha Dolna, Trzemcha Górna, Wierzchowiska Drugie, Wierzchowiska Pierwsze, Wodąca, Wyględów, Wygoda and Zapusta.
Gmina Sienno is bordered by the gminas of Bałtów, Bodzechów, Brody, Ciepielów, Kunów, Lipsko, Rzeczniów and Tarłów.