Most are two-axle buses, but 60 articulated versions (pictured) have also been sold. The sales figure includes Volvo's new electric hybrid, launched last year, which has so far been introduced in Hamburg, Stockholm and Gothenburg.
The manufacturer's first all-electric buses will go into operation in Gothenburg in June this year.
Håkan Agnevall, president and CEO for Volvo Buses, says the sales milestone is "reinforcing our global lead in hybrid buses", adding: "The way we see it, urban public transport will require a mix of hybrids, plug-in hybrids and full-electric buses."
Volvo's 7900 hybrid is said to deliver up to 39% better fuel consumption than a diesel equivalent, with the articulated hybrid delivering a 30% improvement.
The 7900 electric hybrid, says Volvo, has 60% lower energy consumption on city routes than a corresponding Euro 6 diesel version.