The Flag of Berkshire is the flag of the historic county of Berkshire in England. The flag was adopted after the design was submitted by a number of county-based bodies as well as the Lord Lieutenant of the county. Prior to adoption, a banner of the arms of the former Berkshire County Council (abolished in 1998) had been occasionally used to represent the county.
The flag features a traditional symbol of the county, the stag and oak. This design's connection with the county dates from at least Michael Drayton's 1627 poem Battle of Agincourt, where he describes the men of Berkshire marching under the symbol of "a Stag, under an Oake that stood". The stag has twelve-point antlers (characteristic of "royal stag" red deer), a reference to the county's title as the "Royal County of Berkshire". The stag and oak together represent the county's forestry and deer herds.