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.
NB: This is the official flag of Greater Manchester, adopted by Greater Manchester County Council in 1974. Despite the Council's abolition, the County (and Flag) remain.
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 File:County Flag of Greater Manchester.png by Jza84.
Wylve and others.