Meinerzhagen (pronounced [ˈmaɪnɛʁtsˌhaːɡn̩] ⓘ; sometimes spelled Meinertzhagen) is a town in the Märkischer Kreis, North Rhine-Westphalia, Germany.

The family name of the British World War I officer Richard Meinertzhagen recalls an ancestor who came from this town.

The coat of arms of Meinerzhagen shows a red lion as the symbol of the Duchy of Berg, placed on a blue St. Andrew's cross on yellow ground, referring to the family von Badinghagen, which became extinct in the 17th century.

A yellow horn is placed on top of the bordure, taken from the coat of arms of the municipality of Valbert.

The coat of arms of the Amt Meinerzhagen combined symbols of the three historic states of the area.