Tadmor is an unincorporated community in Houston County, Texas, United States. According to the Handbook of Texas, the community had a population of 67 in 2000.

The area in what is known as Tadmor today was first settled in the 1830s. It was named for the biblical town of Tadmor. A post office was established at Tadmor in 1885 and remained in operation until 1914. In the mid-1890s, it had two general stores and a cotton gin serving 25 inhabitants. There was a church, several stores, and scattered houses in the mid-1930s. This went down to one store, two churches, and scattered housing in the mid-1960s. Its population was 67 in 2000.

Tadmor is located on Farm to Market Road 227, 18 mi (29 km) northeast of Crockett in northeastern Houston County.

Tadmor had two schools sometime before 1900, with one for White students and the other for Black. They continued to operate in the mid-1930s then closed later on. Today, the community is served by the Kennard Independent School District.