The Alexander Dennis Enviro400 City is a low-floor double-decker bus produced by the British bus manufacturer Alexander Dennis since 2015, as an alternative to the standard Alexander Dennis Enviro400 MMC bodywork. The Enviro400 City is produced at Alexander Dennis' Falkirk and Scarborough factories in the United Kingdom. It is available as a complete integral diesel or hybrid bus, as well as the Enviro400EV complete integral battery electric bus or Scania N280UD compressed natural gas-powered chassis.

Alexander Dennis is a British bus manufacturing company based in Larbert, Scotland. The largest bus and coach manufacturer in the United Kingdom with a 50% market share in 2019, it has manufacturing plants and partnerships in Canada, China, Europe, Hong Kong, Malaysia, New Zealand, Singapore, South Africa and the United States.