|Millennium:||1st millennium BC|
|97 BC by topic|
|Gregorian calendar||97 BC|
|Ab urbe condita||657|
|Ancient Egypt era||XXXIII dynasty, 227|
|- Pharaoh||Ptolemy X Alexander, 11|
|Ancient Greek era||170th Olympiad, year 4|
|Balinese saka calendar||N/A|
|Chinese calendar||癸未年 (Water Goat)|
2600 or 2540
— to —
甲申年 (Wood Monkey)
2601 or 2541
|Coptic calendar||−380 – −379|
|Ethiopian calendar||−104 – −103|
|- Vikram Samvat||−40 – −39|
|- Shaka Samvat||N/A|
|- Kali Yuga||3004–3005|
|Iranian calendar||718 BP – 717 BP|
|Islamic calendar||740 BH – 739 BH|
|Minguo calendar||2008 before ROC|
|Seleucid era||215/216 AG|
|Thai solar calendar||446–447|
30 or −351 or −1123
— to —
31 or −350 or −1122
Year 97 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Lentulus and Crassus (or, less frequently, year 657 Ab urbe condita). The denomination 97 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.
- Consuls: Gnaeus Cornelius Lentulus and Publius Licinius Crassus Dives
- C. Decianus, the prosecutor of Furius, is himself condemned for his remarks about the death of Saturninus.
- The Romans subdue the Maedi and Dardani.
- L. Domitius takes harsh measures to restore order in Sicily.
- The censors, Flaccus and Antonius, remove M. Duronius from the senate because of his opposition to sumptuary laws.
- A decree of the Roman senate bans human sacrifices.
- Sulla displays a lion hunt for the first time in games at Rome.
- According to Christianity, the birth of Saint Joseph, the husband of Saint Mary the mother of Jesus, and his "earthly-father" - in distinction to God the Father, his "heavenly father." According to this account, Joseph was 92 years old when Jesus was born.