Ionic or Ionian may refer to:
Arts and entertainment
Ionic meter, a poetic metre in ancient Greek and Latin poetry
Ionian mode, a musical mode or a diatonic scale
Places and peoples
Ionian, of or from Ionia, an ancient region in western Anatolia
Ionians, one of four major tribes of the ancient Greeks
Ionian Sea, part of the Mediterranean Sea
Ionian Islands, a group of islands in Greece
Science
Ionian, of or relating to Io, a moon of the planet Jupiter
Ionian stage, a proposed name for the now-defined Chibanian stage in stratigraphy.
Ionic, of or relating to an ion, an atom or molecule with a net electric charge
Ionic bonding, a type chemical bonding
Ionic compound, a chemical compound involving ionic bonding
Other uses
Ionic Greek, an ancient dialect of the Greek language
Ionic (mobile app framework), a software development kit
Ionic order, one of the orders of classical architecture
Ionian Technologies, an American biotechnology company
Hull Ionians, an English rugby club
Ionic No. 5, a typeface
SS Ionic, the name of two ships of the White Star Line