| Achacha District | |
| Native Name: | دائرة عشعاشة |
| Native Name Lang: | ar |
| Type: | District |
| Map Caption1: | Map of Mostaganem Province highlighting Achacha District |
| Subdivision Type: | Country |
| Subdivision Name: |  Algeria |
| Subdivision Type1: | Province |
| Subdivision Name1: | Mostaganem |
| Seat Type: | District seat |
| Seat: | Achacha |
| Unit Pref: | Metric |
| Population Total: | 63,644 |
| Population As Of: | 1998 |
| Population Density Km2: | auto |
| Timezone1: | CET |
| Utc Offset1: | +01 |
| Blank Name Sec1: | Municipalities |
| Blank Info Sec1: | 4 |
Achacha is a district situated within Mostaganem Province, lying on the Mediterranean Sea, northern Algeria. The district was named after its capital, Achacha.
The district is further divided into four municipalities, these include the following: