Hang Seng may refer to:
- Hang Seng Bank, a bank in Hong Kong
- Stock market indices by Hang Seng Bank for companies listed on the Stock Exchange of Hong Kong:
- Hang Seng Index, the major index reflecting stock market performance in Hong Kong
- Hang Seng China Enterprises Index
- Hang Seng China-Affiliated Corporations Index
- Hang Seng Composite Index Series
- Stock market indices by Hang Seng Bank
- Hang Seng School of Commerce, a school in Hong Kong