Hückel or Huckel may refer to:
- Erich Hückel (1896-1980), German physicist and chemist
- Debye–Hückel equation (named after Peter Debye and Erich Hückel), in chemistry, a method of calculating activity coefficients
- Hückel method (named after Erich Hückel), a method for the determination of energies of molecular orbitals
- Extended Hückel method, considers also sigma orbitals (whereas the original Hückel method only considers pi orbitals)
- Hückel's rule (named after Erich Hückel), a method of determining aromaticity in organic molecules
- Walter Hückel (1895-1973), German chemist
- Wolfgang Hückel (born 1936), German diplomat, Ambassador of the GDR in Chad