Raion区（或rayon）是几个前苏联国家的一种行政单位（Oblast 州的一部分）。

A raion (also rayon) is a type of administrative unit of several post-Soviet states (such as part of an oblast). The term is from the French "rayon" (meaning "honeycomb, department"), which is both a type of a subnational entity and a division of a city, and is commonly translated in English as "district".