Islwyn (disambiguation)

Islwyn was one of five local government districts of Gwent from 1974 to 1996.

Islwyn may also refer to:
 * Islwyn (Senedd constituency)
 * Islwyn (UK Parliament constituency)

People with the given name

 * Islwyn Davies, Welsh rugby player
 * Islwyn Davies (priest) (1909–1981)
 * Islwyn Ffowc Elis (1924–2004), Welsh-language writer
 * Islwyn Evans (1898–1974), Welsh rugby player
 * Islwyn Jones (born 1935), Welsh footballer
 * Islwyn Morris (1920–2011), Welsh-language actor