(Polish plural:, from German German: Ansiedlung 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.)