Pine Mills is an unincorporated settlement in Wood County, Texas, United States.

Slightly southeast of Pine Mills' location, a sawmill community named Liberty Hill had been established as early as 1850.

The Pine Mills post office was established in July 1875, and Reed was hired as postmaster.

In 1884, Pine Mills reported a population of 130, two churches, and several businesses including a blacksmith, carpenters, two cotton gins, and several sawmills.

In 1904, the population was noted at 222; by the next year, the majority of the local timber supply had been depleted and the sawmills had left the community.

Wagoner came to Pine Mills in 1884 and operated a general merchandise store; he was also a dentist and undertaker.