Jonathan Kelly (1947–2020) was an Irish folk rock singer-songwriter.
Jonathan or Jon Kelly may also refer to:
Jonathan Kelly (oboist) (born 1969), English Jonathan Falconbridge Kelly (1817 – c. 1855), American journalist and humorist Jon Kelly, British audio engineer and record producer Jon Kelly (swimmer) (born 1965) Canadian butterfly swimmer
See also Jon Kelley (born 1965), American sports journalist and television personality John Kelly (disambiguation)