Lacy may refer to any of the following:

People

Surname
Alan J. Lacy (born 1953), American businessman
Antonio Lacy (born 1957), Spanish doctor and surgeon
Arthur J. Lacy (1876–1975), American politician and lawyer
Benjamin W. Lacy (1839–1895), American  lawyer
Bill Lacy, U.S. political operative and business executive 
Bill N. Lacy, U.S. architect
Bo Lacy (born 1980), American football player
Charles L. Lacy (1885–1942), American politician
Chris Lacy (born 1996), American football player
David Lacy, Scottish theologian
Ed Lacy (1911–1968), American  mystery writer
Eddie Lacy (born 1990), American football player
Edgar Lacy (1944–2011), American basketball player
Elizabeth B. Lacy (born 1945), American  lawyer
Franz Moritz von Lacy (1725–1801), Austrian field marshal
George Carleton Lacy (1888–1951), American Methodist Bishop
Gilbert Lacy (1834–1878), English cricketer
Harriette Deborah Lacy (1807–1874), English actress 
Henry de Lacy, Earl of Lincoln (1251–1311)
Hugh De Lacy (1910–1986), American  politician
James Lacy (actor), British stage actor and theatre manager
James T. Lacy, American politician in Virginia
Jim Lacy, American basketball player
Jeff Lacy (born 1977), American  boxer
Jennifer Lacy (born 1983), American basketball player
Jerry Lacy (born 1936), American  soap opera actor
John Lacy (1615?–1681) English comic actor and playwright
John Lacy (born 1951) English footballer
Kerry Lacy, American relief pitcher
Lee Lacy (born 1948), American  baseball player
Len Lacy (1900–1998), member of the Louisiana House of Representatives
Michael Rophino Lacy (1795–1867), Irish musician
Norman Lacy (born 1941), Australian politician
Onawa Lacy (born 1982), American  beauty queen
Paul Eston Lacy (1924–2005), U.S. pathologist 
Peter von Lacy (1678–1751), Russian commander
Philippe De Lacy (1917–1995), American silent film era child actor
Preston Lacy (born 1969), American  actor
Roger de Lacy (died after 1106), Norman nobleman
Sterling Byrd Lacy, American  politician
Steve Lacy (1934–2004), American  jazz saxophonist
Steve Lacy (born 1998), American singer, musician, songwriter, and record producer
Suzanne Lacy (born 1945), American  artist
Tania Lacy (born 1965), Australian comedian
Thomas Hailes Lacy (1809–1873) British actor, playwright, theatrical manager, bookseller, and theatrical publisher
Thomas J. Lacy (c. 1806–1849), justice of the Arkansas Supreme Court
Tyler Lacy (born 1999), American football player
Venus Lacy (born 1967), American  basketball player
Walter Lacy (1809–1898), English actor
William Lacy (died 1582), English martyr
William Henry Lacy (1888–1925), American Methodist missionary to China
William H. Lacy Jr. (1945–2016), American  businessman

Given name
Men
Lacy Banks (1943–2012), American sportswriter
Lacy Clay (born 1956), U.S. Representative from Missouri's 1st congressional district
Lacy Dock (1896–1963), American baseball player
Lacy Gibson (1936–2011), American blues guitarist, singer, and songwriter
Lacy Hunt, American economist
Lacy Irvine Moffett (1878–1957), American Presbyterian missionary minister to China, and photographer
Lacy Landers (1927–2011), American politician
Lacy Overby (1920–1994), American virologist
Lacy Ryan (c. 1694–1760), English actor
Lacy Thornburg (born 1929), American lawyer and retired United States District Judge
Lacy Walter Giles Yea (1808–1855), British Army colonel

Women
Lacy Barnes-Mileham (born 1964), American discus throw track and field champion
Lacy Crawford, American author, journalist, novelist, and memoirist
Lacy Dagen (born 1997), American collegiate artistic gymnast
Lacy Duarte (1937–2015), Uruguayan visual artist
Lacy J. Dalton (born 1946), American country music singer and songwriter
Lacy J. Davis, American writer and body image activist
Lacy Janson (born 1983), American track and field athlete
Lacy M. Johnson (born 1978), American writer, professor, and activist
Lacy Schnoor (born 1985), American freestyle skier

See also
Lacy, Indiana
Lacy, South Dakota
Lacy, Texas
Lace (disambiguation)
Laci (disambiguation)
de Lacy, an old Norman noble family
Lacy Baronets
Lacy Island, Nunavut, Canada
Lacy Barnes-Mileham, an American discus thrower
Lacey (disambiguation)
Justice Lacy (disambiguation)
Blue Lacy, the Texas dog breed known as Lacys
William Lacy Carter (1925-2017), American businessman and politician

Unisex given names