Zaanstad is a merger of the former municipalities of Assendelft,
Zaandijk (1 Jan 1974), although the municipal flag seems to have been in
use by Zaandam since 1967. On 1 Jan 2002 Zaanstad had 137.667 inhabitants.
The Zaanstad flag is derived from the oldest known flag of Zaandam
Franc van Diest, 30 Jun 2002