- Ibbetson, Julius Caesar
- ICA
- icon
- iconography
- iconology
- iconostasis
- ideal
- ideal landscape
- illuminated manuscripts
- illusionism
- impasto
- Imperial War Museum
- Impressionism
- imprimatura
- Inchbold, J. W.
- Independent Group
- Index of Galleries and Museums
- Indian ink
- Indiana, Robert
- Informalism
- infra-red reflectography
- Ingres, Jean-Auguste-Dominique
- inhabited initial
- ink
- Innes, J. D.
- Inness, George
- Inshaw, David
- installation
- Institut Néerlandais, Paris
- Institute of Contemporary Arts
