Cecily is a given name, one of the English forms of Latin Cecilia. Notable people with the name include:
Cecily Adams (1958–2004), American actress, casting director, and lyricist
Cecily Bonville, 7th Baroness Harington (1460–1529), English peeress
Cecily Brown (born 1969), British painter
Cecily Lefort (1900–1945), British World War II agent
Cecily Neville, Duchess of York (1415–1495), mother of two English kings
Cecily Norden (1918–2011), South African author and equestrian
Cecily O'Neill, American theater educator
Cecily Polson, Australian actress
Cecily Strong (born 1984), American actress
Cecily Tynan (born 1969), Philadelphia broadcast personality
Cecily of York (1469–1507), sister of King Edward V of England
Cecily von Ziegesar (born 1970), American author of novels written for teenagers
