Iagouarophobia Fear of jaguars . (branch of Zoophobia)
Iatrophobia Fear of going to the doctor or of doctors.
Ichthyophobia Fear of fish.
Ichthyosaurphobia Fear of ichthyosaurs . (branch of Deinophobia / Zoophobia)
Iconophobia Fear of icons.
Ideophobia Fear of ideas.
Igniterroremophobia Fear of fire alarms . (branch of Ligyrophobia)
Iliakosystimaphobia Fear of the Solar System.
Illionophobia Fear of numbers ending in -illion . (branch of Numerophobia)
Illyngophobia Fear of vertigo or feeling dizzy when looking down.
Imeratoupateraphobia Fear of Father's Day . (branch of Heortophobia)
Imerologiophobia Fear of calendars.
Imifortigophobia Fear of pick up trucks . (branch of Ochophobia)
Imkengphobia Fear of the word 'd'.
Imparnumerophobia Fear of odd numbers (branch of Numerophobia)
Implexaphobia Fear of tanglement.
Inadspectusremphobia Fear of anything that's out of sight.
Inastiophobia Fear of Crackers on the Keyboard day . (branch of Heortophobia)
Incestophobia Fear of incest.
Indianophobia Fear of Native Americans.
Indikochoiridiophobia Fear of guinea pigs . (branch of Zoophobia)
Indophobia Fear of the Indians or South Asians.
Infantophobia Fear of babies . (branch of Anthropophobia or Ephebiphobia)
Inmaophobia Fear of the word 'c'.
Innobisphobia Fear of Among Us . (branch of Ludectrophobia / Ludophobia)
Insectophobia Fear of insects.
Intercomphobia Fear of intercoms.
Internetphobia Fear of the internet.
Iomophobia Fear of Jupiter's moon io.
Iophobia Fear of poison.
Iotaphobia Fear of I . (branch of Grammaphobia / Panophobia)
Iowaphobia Fear of Iowa . (branch of Americanophobia)
Ipovlopsychophobia Fear of having one’s photograph taken.
Iraphobia Fear of anger . (branch of Animotophobia)
Ironmanphobia Fear of Iron Man . (branch of Kyrofelonoshophobia)
Islamophobia Fear of Muslims.
Isolophobia Fear of solitude, being alone.
Isopterophobia Fear of termites, insects that eat wood.
Isulaphobia Fear of islands.
Itaphobia Fear of the word 'yes'.