Pfäffikon is a municipality in the canton of Zürich in Switzerland. It is the seat of the district of the same name. It is not to be confused with Pfäffikon SZ on Lake Zurich but in the canton of Schwyz.

The canton of Zürich is a Swiss canton in the northeastern part of the country. With a population of 1,553,423, it is the most populous canton in the country. Zürich is the de facto capital of the canton, but is not specifically mentioned in the constitution. The official language is German. The local Swiss German dialect, called Züritüütsch, is commonly spoken.