This is a list of letters of the Greek alphabet. The definition of a Greek letter for this list is a character encoded in the Unicode standard that has a script property of "Greek" and the general category of "Letter". An overview of the distribution of Greek letters is given in Greek script in Unicode.
| Αα | Ββ | Γγ | Δδ | Εε | Ζζ | Ηη | Θθ | Ιι | Κκ | Λλ | Μμ | Νν | Ξξ | Οο | Ππ | Ρρ | Σσς | Ττ | Υυ | Φφ | Χχ | Ψψ | Ωω |
| Letter | Name | Notes |
|---|---|---|
| Ͱͱ | Heta | Archaic letter for voiceless glottal fricative |
| Ͳͳ | Archaic Sampi | Archaic sibilant letter |
| Ϝϝ | Digamma | Archaic letter for /w/ |
| Ͷͷ | Tsan | Pamphylian letter for /w/; alleged sibilant in Arcado-Cypriot |
| Ϻϻ | San | Archaic letter for /s/ |
| Ϸϸ | Sho | Bactrian letter for /ʃ/ |
| Ϙϙ | Archaic Koppa | Letter for /k/ before Ο, Υ, and Ω |
| Ϛϛ | Stigma | Archaic ligature for στ, retained in iconography |
| Ϳϳ | Yot | Greek linguistics letter for /j/ |
| Ϗϗ | Kai | Ligature abbreviating the word kai |
The letters with diacritics below are those which do not denote the typical phonemes described with the standard Greek diacritics (archaic or otherwise).
| Letter | Name | Notes |
|---|---|---|
| Ζ̌ζ̌ | Zeta with caron | Nonstandard letter for Cypriot Greek representing /ʒ/ |
| Κ̌κ̌ | Kappa with caron | Nonstandard letter for Cypriot Greek representing /c/ and /t͡ʃ/ |
| Λ̌λ̌ | Lambda with caron | Nonstandard letter for Cypriot Greek representing /ʎ/ |
| Ν̌ν̌ | Nu with caron | Nonstandard letter for Cypriot Greek representing /ɲ/ |
| Ξ̌ξ̌ | Xi with caron | Nonstandard letter for Cypriot Greek representing /kʃ/ |
| Π̌π̌ | Pi with caron | Nonstandard letter for Cypriot Greek representing /pʲ/ |
| ῤ | Rho with smooth breathing | Archaic letter denoting /r/ |
| Ῥῥ | Rho with rough breathing | Archaic letter denoting /r̥/ |
| Σ̌σ̌ς̌ | Sigma with caron | Nonstandard letter for Cypriot Greek representing /ʃ/ |
| Τ̌τ̌ | Tau with caron | Nonstandard letter for Cypriot Greek representing /c/ |
| Ψ̌ψ̌ | Psi with caron | Nonstandard letter for Cypriot Greek representing /pʃ/ |
Other Greek characters are omitted from the tables above: