With a surname or pseudonym starting with I.
A. I. Routio (1925–2014)
Enni Id (1904–1992)
Kaija-Riitta Iivonen (born 1942)
Mikko Ijäs (born 1978)
Kaija Ikävalko (1918–2015)
Galkin Ilia (1860–1915)
Einar Ilmoni (1880–1946)
Doris Ilou (1945–2015)
Peter Ilsted (1861–1933)
Grinman Ilya (1875–1944)
Karl Ingelius (1885–1956)
Mattias Ingman (born 1940)
Martti Innanen (1931–2014)
Knut Irwe (1912–2002)
Arne Isacsson (1917–2010)
Gideon Isaksson (1911–1980)
Fredrik Johan Isberg (1846–1904)
Fujiwo Ishimoto (born 1941)
Kristina Isola (born 1946)
Maija Isola (1927–2001)
Edvard Isto (1865–1905)
Maija Itkonen (born 1977)
Ivan Ivarson (1900–1939)
Göran Ivarsson (born 1948)
