| Official Name: | Ansariyah |
| Native Name: | الأنصاريّة - Al Anşārīyyah |
| Settlement Type: | Municipality |
| Pushpin Map: | Lebanon |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Lebanon |
| Subdivision Type: | Country |
| Subdivision Type1: | Governorate |
| Subdivision Name1: | South Governorate |
| Subdivision Type2: | District |
| Subdivision Name2: | Sidon District |
| Utc Offset: | +2 |
| Utc Offset Dst: | +3 |
| Coordinates: | 33.4167°N 35.2833°W |
Ansariyah, Ansariyeh, or Insariye (Insârîyé) (ar|الأنصارية) is a municipality in South Governorate in Lebanon, 62 km from Beirut and 20 km south of Sidon. The area is 7.35 km² and is situated near the sea facing it from an altitude of 144 m.
On 5 September 1997 an attack force of seaborne Israeli commandos was ambushed approaching Ansariyah. The ambush had been prepared in advance by fighters from Amal and Hizbullah. The Lebanese army joined in the later stages of the incident. Twelve Israelis were killed.
In 2014, Muslims made up 99.51% of registered voters in Ansariyah. 97.36% of the voters were Shiite Muslims.[1]