Methods and apparatus to collect media exposure information are described. An example apparatus includes an identifier card including a plurality of machine readable codes corresponding to one or more media stations and a metering device including a scanner to read a first one of the codes and a memory to record media exposure information identifying exposure of a user to a media station associated with the first one of the codes, the media information being stored in association with a timestamp corresponding to a time at which the first one of the codes was read.