| Suixi | |
| Other Name: | Suikai |
| Postal Code Type: | Postal code |
| Settlement Type: | County |
| Pushpin Map: | China Guangdong |
| Pushpin Label: | Suixi |
| Pushpin Map Caption: | Location in Guangdong |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Guangdong |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Zhanjiang |
| Area Total Km2: | 2144 |
| Population Density Km2: | auto |
| Coordinates: | 21.3772°N 110.2501°W |
| Timezone: | China Standard |
| Utc Offset: | +8 |
Suixi County (postal: Suikai;) is a county in the southwest of Guangdong province, China. It is under the administration of the prefecture-level city of Zhanjiang and is located at the northern end of the Leizhou Peninsula, bordering the Gulf of Tonkin to the west.