| Phương Sài | |
| Pushpin Map: | Vietnam#Southeast Asia#Asia |
| Pushpin Label Position: | top |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Vietnam |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Khánh Hòa |
| Subdivision Type2: | City |
| Subdivision Name2: | Nha Trang |
| Subdivision Type3: | Region |
| Subdivision Name3: | Central Vietnam |
| Unit Pref: | Imperial |
| Population Blank1 Title: | Ethnicities |
| Timezone Link: | Time in Vietnam |
| Timezone: | Indochina Time |
| Utc Offset: | +07:00 |
| Coordinates: | 12.2514°N 109.1858°W |
Phương Sài is a Ward in Nha Trang, Khánh Hòa Province, Vietnam. The local economy is mainly agricultural, with rice production and cattle breeding.
Phương Sài has a metropolitan area of .[1]