Brightside can refer to:
Places:
- Brightside, South Yorkshire, district of Sheffield
- Shiregreen and Brightside, ward in Sheffield
- Sheffield Brightside (UK Parliament constituency)
- Brightside, California, in Alameda County
- Brightside, Ontario, a township in eastern Ontario, Canada
Other uses:
- Brightside (album), by Killing Time
- Brightside Group PLC, an insurance broking and financial services business
- BrightSide Technologies Inc., a display technology company