The County Flag of Greater Manchester is composed of ten golden castles (arranged in rows of 3-2-3-2) on a red background, fringed by a golden border in the style of a castle battlement.
The ten golden castles represent both the urban landscape of Greater Manchester, and its division in to its ten metropolitan districts: Bolton, Bury, Manchester, Oldham, Rochdale, Tameside, Trafford, Salford, Stockport, and Wigan. The red ground represents man-power and the county's red-brick architectural heritage, both legacies of Greater Manchester's industrial past. The embattled border represents the unity and shared future of the county, and its bold, vigilant and forward-looking character.

The blazon is: "Gules, ten Towers three two three two, all within a Bordure embattled Or".
Based on the June 2011 version of File:County Flag of Greater Manchester.png by Jza84.
Orionist