Rosenberg's post office was established in 1881, a year after Rosenberg was founded on the newly laid route of the Santa Fe Railroad. Early post office locations included a hotel and a general store. Parcel Post service began in 1913, and by 1928 the post office was handling mail from 24 mail trains per day. The U.S. Congress authorized the building of a district post office at 2103 Avenue G in 1939. Home delivery began in 1948. The 1939 structure was expanded and modernized in 1966-67. The history of postal service in Rosenberg reflects the growth and development of the community.