Harappan may refer to:
- Aspects related to Harappa, an archaeological site (c. 3300–1600 BC) and city in Punjab in northeast Pakistan
- The Indus Valley civilisation or Harappan civilisation, a Bronze Age civilisation that throve along Indus River c. 3300 – c. 1700 BC
- Harappan architecture of the ancient Indus Valley civilisation of Harappa
- Harappan language, the language spoken by the Indus Valley civilisation
- Harappan script, the writing system used by the Indus Valley civilisation