OSHA may refer to:
- Occupational Safety and Health Administration, a federal agency of the United States that regulates workplace safety and health
- Occupational Safety and Health Act of 1970, a federal law in the United States, the act that created the Occupational Safety and Health Administration mentioned above
- Occupational Safety and Health Act 1994, a national law of Malaysia
- European Agency for Safety and Health at Work, an agency of the European Union
Osha may refer to:
- Osha, a perennial herb
- Osha, a character in George R. R. Martin's fictional A Song of Ice and Fire fantasy series
- Osha, a character in the television series A Game of Thrones