Ilias Greek: Ηλίας is the Greek version of the name of the Prophet Elijah. It is also commonly spelled Elias.
Notable people with the name include:
- Ilias Akhomach (born 2004), Spanish footballer
- Ilias Ali (Bangladeshi politician) (born 1961), Bangladeshi politician
- Ilias Anastasakos (born 1978), Greek footballer
- Ilias Atmatsidis (born 1969), Greek former football goalkeeper
- Iliaș Colceag (fl. before 1710–1743), Moldavian mercenary and military commander in the Ottoman and Russian Empire
- Ilias Gorchkhanov (1967–2005), the first leader of the Ingush Jamaat
- Ilias Haddad (born 1989 in Nador), Moroccan footballer
- Ilias Hatzipavlis (born 24 May 1949), a Greek sailor
- Ilias Iliadis (footballer) (born 2001), Canadian-Greek footballer
- Ilias Iliadis (judoka) (born 1986), Georgian-born judoka competing for Greece
- Ilias Iliou (1904–1985), member of the Greek Parliament and leader of the United Democratic Left
- Ilias Ioannou (born 1979), footballer
- Ilias Kafetzis, Greek athlete who competed at the 1896 Summer Olympics
- Ilias Kotsios (born 1977), Greek footballer
- Ilias Kyriakidis (born 1985), Greek footballer
- Ilias Kyriazis (born 1978), Greek comic book writer and artist
- Ilias Lalaounis (1920–2013), Greek jewelry designer
- Ilias Louka (born 1974), retired Cypriot shot putter
- Ilias Manikas (born 1980), football striker, currently playing for Rodos F.C.
- Ilias Melkas (Greek: Ηλίας Μέλκας, born 1989), an Albanian footballer for Iraklis Thessaloniki F.C.
- Ilias Mihalopoulos (born 1985), Greek footballer
- Ilias Polatidis (1966–2016), a member of the Popular Orthodox Rally
- Ilias Poursanidis (born 1972), Greek former footballer
- Ilias Rosidis (1927–2019), Greek footballer
- Ilias Solakis (born 1974), Greek footballer
- Ilias Stogiannis (born 1976), Greek former football goalkeeper
- Ilias Tsirimokos (1907–1968), Greek politician
- Ilias Venezis (1904–1973), Greek novelist
- Ilias Vrioni (1882–1932), Albanian politician, Prime Minister of Albania three times
- Ilias Yfantis (born 1936), Greek former footballer
- Ilias Zeytulaev (born 1984), Uzbek footballer
- Ilias Zouros (born 1966), Greek basketball coach