Citybus Limited (Chinese: 城巴有限公司) is a bus company which provides both franchised and non-franchised service in Hong Kong.

From 1984 to 2001, the company offered a cross-border service between Hong Kong and mainland China using mainly double-decker Leyland Olympians, but this was discontinued due to stiff competition.

It commenced operating residential bus services with 100 new Olympians linking housing estates to MTR stations.

[6] In September 1993, Citybus took over 26 franchised routes from China Motor Bus after winning a competitive tender.

During these years Citybus expanded its penetration of the Hong Kong Island market pushing nearly all China Motor Bus routes into low profitability.

It was not only Beijing's first joint venture bus operation, but it also marked the introduction of air-conditioned buses for the first time in the capital city.

In June 2003, Stagecoach Group sold Citybus to Chow Tai Fook Enterprises, the parent company of the major rival operator New World First Bus.

[4] In August 2020, along with New World First Bus, Citybus was sold to the Bravo Transport consortium, made up of private equity firm Templewater Bravo, Hong Kong-listed investment holding company Hans Energy and British bus operator Ascendal Group.

[3] It currently operates two franchises: Citybus also uses its own numbering system according to the service area of bus routes The number assignment on Kowloon Peninsula roughly follows that used by the Kowloon Motor Bus with a few modifications Cityflyer is a subsidiary of Citybus that primarily operates airport coach services.

The vehicles contain exclusive features that cannot be found on the rest of the fleet, including luggage racks equipped with Closed-circuit television, blinds, USB charging ports and more comfortable padded seats with wider legroom As of 2020, the fleet consisted of 1013 buses, of which 950 are Double-decker buses and the remaining 63 are single-decker.