Silesians (Silesian: Ślůnzoki; Silesian German: Schläsinger; Polish: Ślązacy; Czech: Slezané; German: Schlesier) are the inhabitants of Silesia, a historical region divided by the current national boundaries of Poland, Germany and the Czech Republic. This central European ethno-linguistic group should not be confused with German Silesians and their descendants who inhabited both Upper and Lower Silesia until their expulsion in 1945-47. Today, Silesians inhabiting Poland are considered to belong to a Polish ethnographic group, and they speak a dialect of Polish. They are of Slavic descent, but because Germany ruled Silesia for a long time, Silesians have been deeply influenced by German culture.
There have been some debates on whether or not the Silesians (historically, Upper Silesians) constitute a distinct nation. In modern history, they have often been pressured to declare themselves to be German, Polish or Czech, and use the language of the nation currently governing them. Nevertheless, 847,000 people declared themselves to be of Silesian nationality in the 2011 Polish national census (including 376,000 who declared it to be their only nationality, 436,000 who declared to be their first nationality, 411,000 who declared to be their second one, and 431,000 who declared joint Silesian and Polish nationality (173,153 in Poland in 2002), maintaining its position as the largest minority group. About 126,000 people declared themselves as members of the German minority (58,000 declared it jointly with Polish nationality), making it the third largest minority group in the country (93% of Germans living in Poland are in the Polish part of Silesia). 12,231 people declared themselves to be of Silesian nationality in the Czech national census of 2011 (44,446 in Czechoslovakia in 1991), and 6,361 people declared joint Silesian and Moravian nationality in the Slovak national census.
Silesians (Polish: Ślężanie) were a tribe of West Slavs, specifically of the Lechitic/Polish group, inhabiting territories of Lower Silesia, near Ślęża mountain and Ślęza river, on the both banks of the Oder, up to the area of modern city of Wrocław. They were the first permanent inhabitants of the site of Wrocław where they build a fort on Ostrów Tumski in the 9th century or earlier, which at the time was an island on the Oder.
Their tribal name was derived from the name of the mountain and the river, which most likely came from the old Polish word Ślagwa, meaning "humid", which refers to the climate of the area. The name of the region in turn, Silesia, comes from their language and tribal name. Along with the Opolanie, the Ślężanie comprised one of the two major tribes in Silesia. They bordered the Dziadoszanie to their north. The Biezunczanie's territory lay to the west. Other, more minor, Silesian tribes of the time included the Golęszyce, Trzebowianie (who might have actually been part of the Ślężanie), Bobrzanie (who were probably subjects of the Dziadoszanie) and the Głubczyce, further to the south.