- Oct 3 Benedetto Junck, Italian composer, dies at 51
- Oct 4 Otto Weininger, Austrian philosopher (b. 1880)
- Oct 7 Rudolf Lipschitz, German mathematician (b. 1832)
- Oct 23 Francis Ellingwood Abbot, American theologian (Scientific Theism), dies at 66
- Oct 26 Herbert Oakeley, English composer, dies at 73
- Oct 26 Victorin de Joncières, French composer, dies at 64