|Millennium:||1st millennium BC|
|Centuries:||2nd century BC – 1st century BC – 1st century|
|Decades:||40s BC 30s BC 20s BC – 10s BC – 0s BC 0s 10s|
|Years:||14 BC 13 BC 12 BC – 11 BC – 10 BC 9 BC 8 BC|
|11 BC by topic|
|Gregorian calendar||11 BC|
|Ab urbe condita||743|
|Ancient Greek era||192nd Olympiad, year 2|
|Chinese calendar||己酉年 (Earth Rooster)
2686 or 2626
— to —
庚戌年 (Metal Dog)
2687 or 2627
|Coptic calendar||−294 – −293|
|Ethiopian calendar||−18 – −17|
|- Vikram Samvat||46–47|
|- Shaka Samvat||N/A|
|- Kali Yuga||3091–3092|
|Iranian calendar||632 BP – 631 BP|
|Islamic calendar||651 BH – 650 BH|
|Julian calendar||11 BC|
|Minguo calendar||1922 before ROC
|Seleucid era||301/302 AG|
|Thai solar calendar||532–533|
|Wikimedia Commons has media related to 11 BC.|
Year 11 BC was either a common year starting on Monday or Tuesday or a leap year starting on Sunday, Monday or Tuesday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further information) and a common year starting on Saturday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Tubero and Maximus (or, less frequently, year 743 Ab urbe condita). The denomination 11 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.
- Quintus Aelius Tubero and Paullus Fabius Maximus are Roman Consuls.
- Battle of the Lupia River: Roman forces under Augustus's stepson Nero Claudius Drusus win a victory in Germania.
- May – Drusus secures the Rhine frontier and builds Roman fortresses near Bonn, Dorsten, Haltern, and Oberaden.