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

See also

• William Thomas (Islwyn) (1832-1878, bardic name Islwyn), Welsh-language poet and clergyman
• Islington, London, England derived from Halonian Issabalanydd (not a Welsh town)

This disambiguation page lists articles associated with the title Islwyn.
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