Cromwellian (disambiguation)

Cromwellian is an adjective relating to Oliver Cromwell (1599–1658), Lord Protector of the Commonwealth of England, and his era

Cromwellian may also refer to:


 * Roundhead, a member of the Parlimamentarian side of the English Civil War against the Royalists
 * Cromwellians, people from the Cromwellian Commonwealth of England
 * The Cromwellian, a 1960s nightclub in London, England, UK