Deacon is a surname relating to the occupation of deacon. It may refer to:
Adam Deacon (born 1983), English actor
Amos Deacon (1904–1982), American field hockey player
Antony King-Deacon (1941–2005), British journalist and author
Belle Deacon (1904–1995), American Alaskan basketmaker and language and folklore expert
Bernard Deacon (anthropologist) (1903–1927), social anthropologist on the islands of Vanuatu
Bernard Deacon (linguist), British academic
Bert Deacon (1922–1974), Australian rules footballer
Bill Deacon (1944–2019), New Zealand rugby league footballer
Bob Deacon (died 2017), British social policy academic
Brett Deacon (born 1982), English rugby union footballer and coach
Brian Deacon (born 1949), British actor
Bruce Deacon (born 1966), Canadian long-distance runner
Charlie Deacon (1869–1893), English footballer
Clare Deacon (1891–1952), Australian nurse
Cliff Deacon (born 1935), Australian rules footballer
Colin Deacon (born 1959), Canadian entrepreneur and politician
Dan Deacon (born 1981), American musician and composer
Dave Deacon (1929–1990), English footballer
Desley Deacon (born 1941), Australian sociologist, historian and biographer
Destiny Deacon (1957–2024), Australian photographer
Dickie Deacon (1911–1986), Scottish footballer
Don Deacon (1912–1943), Canadian ice hockey player
Donald Deacon (1920–2003), Canadian politician and businessman
Edward Parker Deacon (1844–1901), American crime of passion killer
Elsie Louisa Deacon (1897–1984), British engineer
Eric Deacon (born 1950), English actor and writer
Fern Deacon, English actress
Frances Elizabeth Deacon (1837–1930), English chemist and druggist
Frederick Deacon (1829–1875), British chess master
George Deacon (1906–1984), British oceanographer and chemist
George Deacon (civil engineer) (1843–1909), English civil engineer
Giles Deacon (born 1969), British fashion designer
Gill Deacon (born 1966), Canadian author and broadcaster
Harry Deacon (1900–1946), English footballer
Henry Deacon (cricketer) (1809–1854), English cricketer and umpire
Henry Deacon (industrialist) (1822–1876), British chemist and industrialist
Hilary Deacon (1936–2010), South African archaeologist
James Deacon (artist) (died 1750), English miniature painter
Janette Deacon (born 1939), South African archaeologist
Jared Deacon (born 1975), British sprint athlete
Jeamie Deacon (born 1987), Irish rugby union footballer
Jimmy Deacon (1906–1976), Scottish footballer
Joey Deacon (1920–1981), British author and disability advocate
John Deacon (born 1951), British bassist for the rock band Queen
John Deacon (motorcyclist) (1962–2001), British motorcycle enduro racer
Katy Deacon, British engineer and accessibility advocate
Louis Deacon (born 1980), English rugby union footballer
Marty Deacon (born 1958), Canadian educator and politician
Maxwell Deacon (1910–1970), Canadian ice hockey player
Michael Deacon (actor) (1933–2000), Scottish actor
Michael Deacon (bishop) (died 1500), bishop of St Asaph
Michael Deacon (journalist) (born 1980), British journalist
Paul Deacon (born 1979), English rugby league footballer and coach
Pudentiana Deacon (c.1580–1645), English Benedictine nun
Richard Deacon (actor) (1921–1984), American actor
Richard Deacon (sculptor) (born 1949), British sculptor
Roarie Deacon (born 1991), English footballer
Robin Deacon (born 1973), English artist, writer and filmmaker
Rowan Deacon (born 1976/7), English filmmaker
Russell Deacon, Welsh historian and author
Sharon Deacon (born 1957), Australian basketball player
Simon Deacon (born 1954), Australian rules footballer
Steve Deacon (born 1967), Australian rugby league footballer
Susan Deacon (born 1964), Scottish business executive and politician
Terrence Deacon (born 1950), American anthropologist
Thomas Deacon (1697–1753), English non-juror, liturgical scholar and physician
Thomas Deacon (politician) (1832–1911), Canadian politician from Ontario
Thomas Russ Deacon (1865–1955), Canadian politician
Tom Deacon (comedian) (born 1986), English comedian and broadcaster
Tom Deacon (rugby union) (1868–1921), Wales rugby union footballer
Vera Deacon (1926–2021), Australian historian, writer and philanthropist
Vern Deacon (1908–1965), Australian rugby league footballer
William Deacon (cricketer) (1828–1903), English cricketer and banker
William Deacon (politician) (1872–1943), farmer and member of the Queensland Legislative Assembly
William Arthur Deacon (1890–1977), Canadian literary critic and editor
William Frederick Deacon (1799–1845), English author and journalist