Allenfarm is an unincorporated community in Brazos County, in the U.S. state of Texas.

[1] According to the Handbook of Texas, the community had a population of 30 in 2000.

It is located within the Bryan-College Station metropolitan area.

Allenfarm is located on Farm to Market Road 159 on the Atchison, Topeka and Santa Fe Railway, 24 mi (39 km) south of Bryan in southern Brazos County.

[2] Today, the community is served by the Navasota Independent School District.