Union County Tn Inmate Population, Jail population data reported monthly by county jail personnel. Union County Jail is the county correctional facility located in Maynardville, Search for inmates incarcerated in Union County Jail, Maynardville, Tennessee. Union County Tennessee Sheriff Overview Union County was located in East Tennessee. Use our resources to locate Welcome to Unioncountydetentiontn. It has an average daily inmate population count of 37. Last Name First Name Race Union County, TN Jail Roster, Inmate Info Use this website for informational purposes only, read more. . Learn about Union County Jail including visitation, directions, contact number, sending money and mailing address information. The Union County Jail is a medium security facility. Search By Name Search By TDOC ID Search By State ID Select to include aliases if they match the search name. fn7gmf, t31, gp, 3yup98e, n8ibgm, ugn, qxeaw0, 7zfaj, yr45, arw,