Flag of Surrey

The flag of Surrey is the blue and gold chequered flag of the traditional county of Surrey and is derived from the coat of arms of William de Warenne, 2nd Earl of Surrey who adopted arms similar of the Capetian Count of Vermandois on his marriage to Elizabeth, Countess of Leicester (died 1138), who was first married to Robert de Beaumont, 1st Earl of Leicester. She was a younger daughter of Hugh I, Count of Vermandois (1057–1102). Similar arms were also adopted by his brother in law, Ralph I de Beaugency, who married Hugh I's oldest daughter, Matilda. (heraldic blazon: Chequy Or and Azur).

The Surrey flag was officially registered as a "traditional design" by the Flag Institute on 11 September 2014 following research by Philip Tibbetts on behalf of the Association of British Counties, which showed that the county was linked to an emblem of antiquity. Prior to this date, the county had no official flag but the banner of the coat of arms of Surrey County Council was frequently used instead.