Blairstown is an unincorporated community in East Feliciana Parish, Louisiana, United States. The community is located less than 4 miles north of Pride and 8 miles southeast of Clinton. It is speculated that the community is named after John Insley Blair. In the fall of 1866 a Presbyterian missionary named Rev. John Arndt Reiley migrated to t…Blairstown is an unincorporated community in East Feliciana Parish, Louisiana, United States. The community is located less than 4 miles north of Pride and 8 miles southeast of Clinton. It is speculated that the community is named after John Insley Blair. In the fall of 1866 a Presbyterian missionary named Rev. John Arndt Reiley migrated to the community from Blairstown, New Jersey.