The Meitetsu 6600 series (名鉄6600系) was a commuter electric multiple unit type operated by Nagoya Railroad (Meitetsu) on Seto Line services in Japan from 1978 to 2013.

However, Meitetsu made an agreement with the city in 1971 to connect Seto Line with Sakai Station.

Meitetsu procured six 2-car sets based on the 6000 series design used on Nagoya Main Line services.

In 1988, the fleet was retrofitted with longitudinal seating and air conditioning to cope with increase capacity on the Seto Line (the sets were originally built with transverse seating).

This Japanese rail transport related article is a stub.