Illingworth may refer to:
People Albert Illingworth, 1st Baron Illingworth (1865–1942), British businessman and politician Alfred Illingworth (1827–1907), English worsted spinner and politician A. E. Illingworth (1868–1942), Australian Church of Christ minister Charlie Illingworth (1871–1926), Australian rules footballer Charles Illingworth (1899–1991), British surgeon Eddie Illingworth (born 1938), Australian cricketer Edward Illingworth (1896–1924), English cricketer Francisco Illingworth (1905–1982), Vice President of Ecuador Frederick Illingworth (1844–1908), Australian land agent and politician George Illingworth (1877–1950), Australian politician Illingworth Kerr (1905–1989), Canadian landscape painter James Illingworth (born ?), British Army officer Jeremy Illingworth (born 1977), English footballer Jim Illingworth (1901–1967), Australian rules footballer John Illingworth (English Officer) (1786–1853), British naval officer, Ecuadorian Founding Father, South American Admiral John Illingworth (yacht designer) (1903–1980), British naval architect John Illingworth (footballer) (1904–1964), English footballer John Lister Illingworth Fennell (1918–1992), British historian J. R. Illingworth (1848–1915), British Anglican priest and academic Julian Illingworth (born 1984), American professional squash player Leslie Gilbert Illingworth (1902–1979) British cartoonist Lucy Illingworth, English pianist Max Illingworth (born 1992), Australian Chess Grandmaster Nelson Illingworth (1862–1926), English sculptor Nigel Illingworth (born 1960), English cricketer Percy Illingworth (1869–1915), British politician Philip Illingworth (born 1948), Canadian judoka Ray Illingworth (1932–2021), English cricketer Richard Illingworth (born 1967), English cricketer and umpire Ronald Illingworth (1909–1990), British paediatrician Sarah Illingworth (born 1963), New Zealand cricketer Simon Illingworth (born 1967), Australian anti-corruption spokesman William Illingworth (archivist) (1764–1845), English lawyer and archivist William H. Illingworth (1844–1893), English photographer Fictional Lord Illingworth, a fictional character from the 1893 play A Woman of No Importance by Oscar Wilde
Places Firebase Illingworth, a former United States Army firebase in southwestern Vietnam Illingworth, Alberta, a locality in Canada Illingworth, West Yorkshire, England, a suburb of Halifax