C
- Alessandro Cagliostro, Sicilian charlatan and occultist
- Plutarco Elías Calles, President of Mexico
- John Campbell, 2nd Marquess of Breadalbane, British politician, Member of Parliament (1820–1826, 1832–1834), Lord Chamberlain (1848–1852, 1853–1858), Grand Master of Scotland (1824–1826)
- Malcolm Campbell, English motor-racer
- Manuel Camus, Philippine Senator. October 12, 1898, Zetland in the East Lodge No 508 Singapore, under the jurisdiction of the M. W. Grand Lodge of England.
- George Canning, British politician and Prime Minister.
- Gheorghe Grigore Cantacuzino Prime Minister of Romania.
- Eddie Cantor. Entertainer, raised in Munn Lodge No 190, New York City
- Emmanuel Carasso. Ottoman lawyer and politician, Grand Master of the Italian-rite Macedonia Risorta in Salonica.
- Carol II, King of Romania (1930–40).
- José Miguel Carrera, Chilean General and President. St. John's Lodge No. 1, New York
- Kit Carson, American Adventurer. Montezuma Lodge No. 109, Sante Fe, New Mexico
- Giacomo Casanova, Venetian adventurer, "lodge of the Duke of Clermont", Paris, 1750
- Paul Foster Case, Founder of the Los Angeles occult school, the Builders of the Adytum, Fairport Lodge No. 476, Fairport, New York
- Lewis Cass, US Politician and diplomat. American Union Lodge No.1, Marietta, Ohio. First Grand Master of the Grand Lodge of Michigan
- Ion C. Câmpineanu (1841-1888), Romanian politician, Minister of Justice, Finance and Foreign Affairs.
- Marc Chagall, Russian artist. initiated in 1912
- Thomas Chalmers, Lodge St. Vigean, 1800
- Joshua Chamberlain, Commander of US forces on Little Round Top during the American Civil War battle of Gettysburg, and governor of Maine. United Lodge #8, Brunswick, Maine
- Nicolas Chamfort, French writer, Loge des Neuf Soeurs, Paris
- Charles XIII of Sweden, King of Sweden and Norway.
- Claire Lee Chennault, U.S. Air Corp Major-General; Commanded of the "Flying Tigers" in WWII. League City Lodge No. 1053, League City, TX
- Victor Child Villiers, 7th Earl of Jersey, British banker, politician and colonial administrator, Grand Master of New South Wales (1891–1893)
- Walter Chrysler Founder of Chrysler Corporation.
- George Spencer-Churchill, 8th Duke of Marlborough, initiated 9 Jan 1871, with brother Randolph.
- Lord Randolph Churchill, Winston Churchill's father, initiated 9 Jan 1871 in Churchill Lodge.
- Winston Churchill, Prime Minister of the United Kingdom; 24 May 1901, Studholme Alliance Lodge No. 1591.
- André Citroën, French engineer and motor-car manufacturer, Lodge La Philosophie, Paris
- John H. Clarke, US Associate Justice (1916–1922)
- Tom C. Clark, US Associate Justice (1949–1967)
- Mark W. Clark, US Army General, Mystic Tie Lodge No. 398, Indianapolis
- William Clark, Explorer, Lewis and Clark expedition. Saint Louis Lodge No. 111.
- Henry Clay Speaker of the. U.S. House of Representatives and Grand Master of Kentucky.
- Moses Cleaveland founded the city of Cleaveland, Ohio, Worshipful Master of Moriah Lodge in 1791
- Patrick Cleburne Confederate General in the civil war. Lafayette lodge #16, Helena, Arkansas
- DeWitt Clinton, Governor of New York State, Grand Master of NY during the Morgan Affair, The Holland Lodge No. 8, New York, 1790
- Harold Coates, Australian politician, Grand Master of New South Wales (1980–1985)
- Tyrus "Ty" Cobb, baseball star. Royston Lodge No. 426, Detroit
- Howard Coble, (March 18, 1931- ), Member of the U.S. House of Representatives and Guilford Lodge number 656 AF&AM Greensboro, North Carolina.
- N. D. Cocea (1880-1949), Romanian journalist, novelist and political activist.
- Mickey Cochrane (Baseball Hall of Famer)
- William F. Cody, a.k.a. Buffalo Bill, raised in Platte Valley Lodge No. 15, Nebraska
- George M. Cohan, Broadway star, raised in Pacific Lodge No. 233, New York City
- Harry Cohn, Pacific Lodge No. 233, New York
- Ernest E. Cole, Commissioner of Education of the State of New York (1940–1942)
- Nat King Cole pianist and ballad singer.
- Thomas Cole, English-born American artist, founder of Hudson River School. Amity Lodge No. 5, Zanesville, Ohio.
- Michael B. Coleman, American politician, Mayor of Columbus, Ohio.
- Phil Collins, Grammy Award winning singer-songwriter, drummer for the British group Genesis. SOHO Lodge No. 3
- Samuel Colt manufacturer of Colt revolvers
- Émile Combes, French Prime Minister
- Spencer Compton, 7th Marquess of Northampton, Pro Grand Master, United Grand Lodge of England, 2001–2009
- John Cook Union general in the American Civil War
- Joseph Cook 6th Prime Minister of Australia Initiated into Lodge Independent No 8 UGLNSW 12 Feb 1892
- Charlie Conacher, Canadian ice hockey player. Initiated in North Gate Lodge No. 591, Pickering, Ontario, in 1935.
- Marquis de Condorcet, French mathematician and philosopher, Lodges de Neuf Soeurs
- Gordon Cooper, U.S. astronaut, member of Carbondale Lodge No. 82, Colorado
- Harry H. Corbett actor- star of Steptoe and Son
- Jess Conrad entertainer, Member of Chelsea Lodge No. 3098
- Edith Cowan, First woman elected to Australian Parliament, Member of St Cuthberts Lodge Perth Australia (Le Droit Humain).
- James Craik, Physician General of the United States Army
- Francesco Crispi, Prime Minister of Italy (possibly expelled in 1894?)
- Miron Cristea Patriarch of the Romanian Orthodox Church (1925–39), Prime Minister of Romania (1938–39).
- Davy Crockett, 19th-century American folk hero, frontiersman, soldier and politician
- Aleister Crowley, English occultist, Anglo-Saxon Lodge No. 343, Paris (GLdF), 1904
- Abraham Curry, founding father of Carson City, Nevada. Masonic Lodge No. 1, Carson City.
- Admiral of the Fleet Sir Lucius Curtis, Provincial Grand Master for the Province of Hampshire from 1840 until his death in 1869.
- William Cushing, US Associate Justice (1789–1810), St. Andrews Lodge, Boston
- Alexandru Ioan Cuza Romanian Domnitor of the Danubian Principalities, 1859-66.
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