Old Dime Box is an unincorporated community in Lee County, Texas, United States.

The origin of the name "Dime Box" stemmed from a custom in which early settlers would use a large, wooden box to forward and receive mail, or order small items from a carrier on horseback traveling to nearby Giddings.

[4] In 1913, when the Southern Pacific Railroad built a line three miles southeast of the community, most of the residents and businesses moved to a site near the tracks.

A Texas Historical Marker was erected in 1968 that honored Old Dime Box as the second oldest community in Lee County.

The district has one campus, Dime Box School, that serves students in grades pre-kindergarten through twelve.