The calculated distance (air line) between Horgen and Zürich (Kreis 11) is approximately 12 miles respectively 19 kilometers.
By car or train, the actual journey to Zürich (Kreis 11) is certainly longer, as only the direct route (as the crow flies) between Horgen and Zürich (Kreis 11) has been calculated here.
Air line (approximately)
19 kilometers
10 nautical miles