O'Farrell, TexasO'Farrell is an unincorporated community in Cass County, Texas, United States. According to the Handbook of Texas, the community had a population of 20 in 2000.HistoryThe area was first settled in the 1870s.GeographyO'Farrell is located on Farm to Market Road 995, west of Atlanta in northern Cass County.EducationToday, the community is served by the Linden-Kildare Consolidated Independent School District.