Koog aan de Zaan is a town in the Dutch province of North Holland. It is a part of the municipality of Zaanstad, and lies about 11 km northwest of Amsterdam.
Koog aan de Zaan was a separate municipality until 1974, when the municipality of Zaanstad was created. Koog aan de Zaan is one of the smallest submunicipalities in Zaanstad, having a surface area of 320 hectare.
Koog aan de Zaan has a population of around 11770.
A8ernA, an urban renewal project for the space under the A8 motorway as it passes through Koog aan de Zaan, was a joint winner of the 2006 European Prize for Urban Public Space.