Every county in Maryland has its own flag, either officially through adoption or through custom and usage. Several Maryland county flags, such as the flags of Calvert County, Baltimore County, and Anne Arundel County, incorporate the coat of arms of the Calvert family in their designs, due to the design being featured in the Maryland state flag, and the Calvert family's prominence in Maryland history. Howard County's flag also incorporates design cues from the Maryland state flag, albeit of the Crossland banner, rather than Calvert family heraldry.