Illingworth
- A Woman of No Importance
- A. E. Illingworth
- Albert Illingworth, 1st Baron Illingworth
- Alfred Illingworth
- Charles Illingworth
- Charlie Illingworth
- Eddie Illingworth
- Edward Illingworth
- Firebase Illingworth
- Francisco Illingworth
- Frederick Illingworth
- George Illingworth
- Illingworth Kerr
- Illingworth, Alberta
- Illingworth, West Yorkshire
- J. R. Illingworth
- James Illingworth
- Jeremy Illingworth
- Jim Illingworth
- John Illingworth (footballer)
- John Illingworth (yacht designer)
- John Lister Illingworth Fennell
- Julian Illingworth
- Leslie Gilbert Illingworth
- Lucy Illingworth
- Max Illingworth
- Nelson Illingworth
- Nigel Illingworth
- Percy Illingworth
- Philip Illingworth
- Ray Illingworth
- Richard Illingworth
- Ronald Illingworth
- Sarah Illingworth
- Simon Illingworth
- William H. Illingworth
- William Illingworth (archivist)