Sunnyvale
- County:
- Dallas County
- County Seat:
- No
- Area (mi²):
- 16.534
- State:
- Texas
Sunnyvale is a town located in Dallas County, Texas. Sunnyvale has a 2026 population of 8,839. Sunnyvale is currently growing at a rate of 3.11% annually and its population has increased by 13% since the most recent census, which recorded a population of 7,822 in 2020.