Ii

II (or ii) is the Roman numeral for two.

II, Ii or ii can also refer to:

 ii, a digraph in certain alphabets
 Ii, Finland, a municipality of Finland
 Illegal immigrant
 Optic nerve, second cranial nerve
 Yi language (ISO 639 alpha-2, ii)
Led Zeppelin II, an album from 1969
Inanimate Insanity, YouTube independent-animated web series