75 BC

Millennium:	1st millennium BC
Centuries:	2nd century BC – 1st century BC – 1st century
Decades:	100s BC 90s BC 80s BC – 70s BC – 60s BC 50s BC 40s BC
Years:	78 BC 77 BC 76 BC – 75 BC – 74 BC 73 BC 72 BC

75 BC by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments

**75 BC in other calendars**
Gregorian calendar	75 BC
Ab urbe condita	679
Armenian calendar	N/A
Bahá'í calendar	-1918 – -1917
Bengali calendar	-667
Berber calendar	876
Buddhist calendar	470
Burmese calendar	-712
Byzantine calendar	5434 – 5435
Chinese calendar	[[Sexagenary cycle\|]]年 (2562/2622) — to — [[Sexagenary cycle\|]]年 (2563/2623)
Coptic calendar	-358 – -357
Ethiopian calendar	-82 – -81
Hebrew calendar	3686 – 3687
Hindu calendars
- Bikram Samwat	-18 – -17
- Shaka Samvat	N/A
- Kali Yuga	3027 – 3028
Holocene calendar	9926
Iranian calendar	696 BP – 695 BP
Islamic calendar	717 BH – 716 BH
Japanese calendar
Korean calendar	2259
Thai solar calendar	469

Year 75 BC was a year of the pre-Julian calendar.

Events

In Rome, the tribune Quintus Opimius speaks out against Sullan restrictions on the tribunate, in orations noted for sarcasm against conservatives.
Cicero is quaestor in Rome.
Nicomedes IV of Bithynia bequeaths his kingdom to Rome on his death (75/4 BC), angry by the arrangement, Mithridates VI of Pontus declares war on Rome and invaded Bithynia, Cappadocia and Paphlagonia, thus starting the Third Mithridatic War.
Third Mithridatic War—M. Aurelius Cotta is defeated by Mithridates in the Battle of Chalcedon.

Julius Caesar travels to Rhodes to study under Apollonius Molon. On his way across the Aegean Sea, he is kidnapped by Cilician pirates and held prisoner in the Dodecanese islet of Pharmacusa. The young Caesar is held for ransom of twenty talents, he insists they ask for fifty. After his release Caesar raises a fleet at Miletus, pursues and crucifies the pirates in Pergamon.