Lay Siyah Rural District
Lay Siyah Rural District 
    Persian: دهستان لائ سياه  | |
|---|---|
| Coordinates: 32°43′35″N 52°57′14″E / 32.72639°N 52.95389°E | |
| Country | Iran | 
| Province | Isfahan | 
| County | Nain | 
| District | Central | 
| Capital | Homaabad-e Olya | 
| Population  (2016)  | |
 • Total  | 2,302 | 
| Time zone | UTC+3:30 (IRST) | 
Lay Siyah Rural District (Persian: دهستان لائ سياه) is in the Central District of Nain County, Isfahan province, Iran. Its capital is the village of Homaabad-e Olya.