Citybus Limited is a bus company which provides both franchised and non-franchised service in Hong Kong. The franchised route network serves Hong Kong Island, cross-harbour routes, North Lantau, Hong Kong International Airport, Kowloon, New Territories, Shenzhen Bay Port and Hong Kong–Zhuhai–Macau Bridge Hong Kong Port. The non-franchised routes serve mainly City One Sha Tin. It also provides bus rental services and staff bus services for some large companies, such as TVB and China Light and Power.

The China Motor Bus Company, Limited, often abbreviated as CMB, is a property developer in Hong Kong. Before its franchise lapsed in 1998, it was the first motor bus operator in Hong Kong, and was responsible for the introduction of double-decker buses to Hong Kong Island.