Sunnyside, Washington
| Sunnyside | |
|---|---|
| Edison Avenue | |
| Location of Sunnyside, Washington | |
| Coordinates: 46°19′04″N 119°59′40″W / 46.31778°N 119.99444°W | |
| Country | United States | 
| State | Washington | 
| County | Yakima | 
| Incorporated | September 16, 1902 | 
| Government | |
| • Type | Council–manager | 
| Area | |
|  • Total | 7.53 sq mi (19.49 km2) | 
| • Land | 7.53 sq mi (19.49 km2) | 
| • Water | 0.00 sq mi (0.00 km2) | 
| Elevation | 735 ft (224 m) | 
| Population  (2020) | |
|  • Total | 16,375 | 
|  • Estimate  (2022) | 16,296 | 
| • Density | 2,232.03/sq mi (861.84/km2) | 
| Time zone | UTC−8 (Pacific (PST)) | 
| • Summer (DST) | UTC−7 (PDT) | 
| ZIP code | 98944 | 
| Area code | 509 | 
| FIPS code | 53-68750 | 
| GNIS feature ID | 2412008 | 
| Website | sunnyside-wa.gov | 
Sunnyside is a city in Yakima County, Washington, United States. The population was 16,375 at the 2020 census, making it the second-most populous city in Yakima County.