Titus Calpurnius Siculus was a Roman bucolic poet. Eleven eclogues have been handed down to us under his name, of which the last four, from metrical considerations and express manuscript testimony, are now generally attributed to Nemesianus, who lived in the time of the emperor Carus and his sons. The separate authorship of the eclogues of Calpurnius and Nemesianus was established by Haupt.