|Millennium:||1st millennium BC|
|113 BC by topic|
|Gregorian calendar||113 BC|
|Ab urbe condita||641|
|Ancient Egypt era||XXXIII dynasty, 211|
|- Pharaoh||Ptolemy IX Lathyros, 4|
|Ancient Greek era||166th Olympiad, year 4|
|Balinese saka calendar||N/A|
|Chinese calendar||丁卯年 (Fire Rabbit)|
2584 or 2524
— to —
戊辰年 (Earth Dragon)
2585 or 2525
|Coptic calendar||−396 – −395|
|Ethiopian calendar||−120 – −119|
|- Vikram Samvat||−56 – −55|
|- Shaka Samvat||N/A|
|- Kali Yuga||2988–2989|
|Iranian calendar||734 BP – 733 BP|
|Islamic calendar||757 BH – 756 BH|
|Minguo calendar||2024 before ROC|
|Seleucid era||199/200 AG|
|Thai solar calendar||430–431|
14 or −367 or −1139
— to —
15 or −366 or −1138
Year 113 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Caprarius and Carbo (or, less frequently, year 641 Ab urbe condita). The denomination 113 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 Cimbri and Teutones cross the Danube and enter the lands of the Celtic tribe, the Taurisci. The latter appeal to Rome for assistance and the Senate sends an army under Gnaeus Papirius Carbo to drive the Germans back. The Romans attack the retreating columns as they pass the town of Noreia, but the Roman army is defeated in an ambush.
- Germanic tribes attack Gaul and northern Spain.
- War between the Celtiberians and the Romans.
- An incense burner, later found in the tomb of Liu Sheng, Prince of Zhongshan in Mancheng, Hebei, is made. Han dynasty. It is now kept at Hebei Provincial Museum, Shijiazhuang.