A province is a territorial unit, almost always an administrative division, within a country or state.

The English word "province" is attested since about 1330 and derives from the 13th-century Old French "province," which itself comes from the Latin word "provincia," which referred to the sphere of authority of a magistrate; in particular, to a foreign territory.

A possible Latin etymology is from "pro-" ("on behalf of") and "vincere" ("to triumph" or "to take control of"). Thus a "province" was a territory or function that a Roman magistrate held control of on behalf of his government. This agrees with the Latin term's earlier usage as a generic term for a jurisdiction under Roman law.

In geology, the term "province" refers to a specific physiogeographic area that comprises a grouping of like bathymetric or former bathymetric elements (now sedimentary strata above water) whose features are in obvious contrast to the surrounding regions, or other "provinces." The term usually refers to sections or regions of a craton recognized within a given time-stratigraphy, i.e., recognized within a major division of time within a geologic period.