Vidalia may refer to:
- Vidalia (alga), a genus of red algae in the family Rhodomelaceae
- Vidalia (fly), a genus of tephritid or fruit flies in the family Tephritidae
- Places
- Vidalia, Georgia
- Vidalia, Georgia, micropolitan area, an area defined by the United States Census Bureau
- Vidalia Regional Airport, in Georgia
- Vidalia, Louisiana
- Natchez–Vidalia Bridge, two twin cantilever bridges carrying US Routes 65, 84 and 425 across the Mississippi River between Vidalia, Louisiana and Natchez, Mississippi
- Vidalia High School (disambiguation)
- Other
- Vidalia onion, a sweet onion of certain varieties, grown in a production area defined by law in Georgia
- Vidalia (software), a software program which is a cross-platform controller GUI for Tor, built using the Qt toolkit
- "Vidalia" (song), a song recorded by Sammy Kershaw