Atwell, TexasAtwell is an unincorporated community in Callahan County, in the U.S. state of Texas. According to the Handbook of Texas, only eight people lived in the community in 2000. It is located within the Abilene [metropolitan area].GeographyAtwell is located in eastern Callahan County.EducationA school was established in Atwell around 1886 and was named Bell Branch, then Flag Springs. Today, the community is served by the Cross [Plains Independent School District].