Weiss (or Weiß, German for white or knows) may refer to:
- Weiss (surname), including Weiß
- Mount Weiss, a mountain located in the Sunwapta River valley of Jasper National Park
- USS Weiss (DE-378), a cancelled John C. Butler class destroyer escort
- USS Weiss (APD-135), a Crosley-class high-speed transport
- Fall Weiss, two German military operations
- Fall Weiss (1939), against Poland
- Fall Weiss (1943), in occupied Yugoslavia
- Weissbier, a type of beer.
- Weiß, an album by Böhse Onkelz; see Weiß & Schwarz
- Weisshorn, a mountain in the Alps
- Weissenborn, a lap slide guitar