Heck or Hecke may refer to:
- Another, less religious and often humorous, way of referring to Hell (see minced oath).
- Heck reaction, a chemical reaction that forms a substituted alkene
- Hecke algebra
- Heck cattle
- Hecke character
- Heck horse
- Hecke operator
- Parnall Heck, a 1930s British four-seat cabin monoplane
- NOAAS Heck (S 591), originally USC&GS Heck, a survey ship in service with the United States Coast and Geodetic Survey from 1967 to 1970 and with the United States National Oceanic and Atmospheric Administration from 1970 to 1995