| Yby Yaú | |
| Settlement Type: | City and district |
| Pushpin Map: | Paraguay |
| Subdivision Type: | Country |
| Subdivision Type1: | Department |
| Subdivision Name1: | Concepción |
| Elevation M: | 163 |
| Established Title: | Foundation |
| Established Date: | 20 December 1984 |
| Population Total: | 31290[1] |
| Area Total Km2: | 2420 |
| Timezone: | -4 Gmt |
| Postal Code Type: | Postal code |
| Postal Code: | 8900 |
| Area Code: | 595 39 |
| Blank Name: | Climate |
| Coordinates: | -22.9631°N -56.5358°W |
Yby Yaú (Guarani: Yvy Ja'u) is a district and city located in the department of Concepción of Paraguay.