Sredorek is a historical and geographical region in northeastern Republic of Macedonia. It includes settlements in the Pčinja river valley, parts of the mountainous regions of Kozjak (Kozjačija), German and Rujen, which are today located within the Municipality of Staro Nagoričane. The region is predominantly inhabited by ethnic Macedonians and ethnic Serbs, adherents of Eastern Orthodoxy. In the Middle Ages, the region was part of the župe (counties) of Žegligovo and Preševo.