Methods, apparatus, systems and articles of manufacture to monitor mobile internet usage are disclosed. An example method includes identifying, by executing an instruction with a processor, an application associated with a request for Internet content, the request sent at an identified time; determining, by executing an instruction with the processor, that the application is operating in a background mode at the identified time by identifying a uniform resource location (URL) corresponding to the request, the URL included in the request when the application is operating in the background mode; and crediting, by executing an instruction with the processor, the Internet content as a background application when the application is operating in the background mode at the identified time.