The AEC 661T was a two-axle double deck trolleybus chassis manufactured by AEC between 1931 and 1942.

Based on the AEC Regent bus chassis, 330 were built for United Kingdom operators.

[1] The first four of these were supplied to Southend Corporation.

[2] Bodywork on early models was similar to that on the AEC Regent motor bus, but a full-fronted version was used from 1934.

This bus-related article is a stub.