Year 114 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Balbus and Cato (or, less frequently, year 640 Ab urbe condita) and the Third Year of Yuanding. The denomination 114 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

• The first temple of Venus is built.

• Mithridates VI Eupator becomes king of Bosporus.

• Lucius Orbilius Pupillus, Roman grammarian and writer
• Publius Cornelius Lentulus Sura, Roman consul (d. 63 BC)
• Quintus Hortensius, Roman consul and orator (d. 50 BC)

• Zhang Qian, Chinese explorer and diplomat (b. 195 BC)