|AD 45 by topic|
|Gregorian calendar||AD 45|
|Ab urbe condita||798|
|Balinese saka calendar||N/A|
|Chinese calendar||甲辰年 (Wood Dragon)|
2741 or 2681
— to —
乙巳年 (Wood Snake)
2742 or 2682
|Coptic calendar||−239 – −238|
|- Vikram Samvat||101–102|
|- Shaka Samvat||N/A|
|- Kali Yuga||3145–3146|
|Iranian calendar||577 BP – 576 BP|
|Islamic calendar||595 BH – 594 BH|
|Julian calendar||AD 45|
|Minguo calendar||1867 before ROC|
|Seleucid era||356/357 AG|
|Thai solar calendar||587–588|
171 or −210 or −982
— to —
172 or −209 or −981
AD 45 (XLV) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Vinicius and Corvinus (or, less frequently, year 798 Ab urbe condita). The denomination AD 45 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.
- Salzburg (Juvavum) is awarded the status of a Roman municipium.
- Emperor Claudius expels the Jews from Rome.
- Claudius founds Savaria, today the Hungarian city of Szombathely.
- The Senate holds consultations regarding real estate speculation in Rome.
- Paul of Tarsus begins his missionary travels, according to one traditional dating scheme.
- Ban Zhao, first female Chinese historian (d. 116)
- Domitilla the Younger, Roman noblewoman (d. AD 66)
- Lucius Julius Ursus Servianus, Roman politician (d. 136)
- Lucius Vipstanus Messalla, Roman orator (approximate date)
- Plutarch, Greek historian and biographer (approximate date)
- Publius Papinius Statius, Roman poet (approximate date)
- Tiberius Julius Celsus Polemaeanus, Roman politician
- Pomponius Mela, Roman geographer (approximate date)
- Vardanes I, king of the Parthian Empire (approximate date)