Osiedle
(Polish plural: , from German  meaning settlement) is a term used in Poland to denote a designated subdivision or neighbourhood of a city or its , or of a town, with its own council and executive. Like the  and sołectwo, an  is an auxiliary unit (jednostka pomocnicza) of a gmina. These units are created by decision of the gmina council, and do not have legal personality in their own right. In the case of an urban-rural gmina, it is also possible for a whole town to be designated an auxiliary unit. Not all Polish cities or towns have  in the above sense. However the word  is also frequently used to denote any housing estate or development. (In this sense it sometimes appears in addresses, where the abbreviation "Os." is commonly used.) References
Polish Act of 8 March 1990 on gmina self-government, as amended (in Polish)

Administrative divisions of Poland
Types of administrative division