Markowitz is a Germanized/Yiddish version of Slavic name Markovich. Notable people with the surname include:
Deborah Markowitz (born 1961), Vermont secretary of state Gerald Markowitz (born 1944), American historian Harry Markowitz (1927–2023), financial economist and Nobel Laureate John Markowitz (born 1954), professor of psychiatry at Weill Cornell Medical College Kate Markowitz (born 1956), American singer-songwriter Marty Markowitz (born 1945), Brooklyn borough president Mitch Markowitz, Canadian television executive Nicholas Markowitz (1984–2000), American murder victim Phil Markowitz (born 1952), pianist Richard Markowitz (1926-1994), American film composer William Markowitz (1907–1998), American astronomer
See also The Family Markowitz, 1996 novel Markovitz, a cognate