A post office was established in Mumford in 1878, and the community continued to expand through the rest of the nineteenth century.

Its fortunes declined after a devastating flood in 1899, which destroyed most of the community; Mumford never attained its pre-flood prosperity.

[6] The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

Mumford lies on the junction of the Union Pacific Railroad lines connecting to Houston, and the Gulf Coast and onwards to Mexico.

To the north lies Valley Junction, with lines connecting to: Austin and San Antonio; Dallas; Fort Worth; and East Texas.