Eckstein is a surname of German origin, meaning "cornerstone" (eck means 'corner', and stein means 'stone'). According to information gleaned from the U.S. Census, around 2,500 people in the United States have the surname Eckstein. Notable people with the surname include:
Arthur Eckstein, American historian
Bernd Eckstein, (Born 1953) German ski jumper
David Eckstein (born 1975), American baseball player
Dieter Eckstein (born 1964), German footballer
Emma Eckstein (1865–1924), early patient of Sigmund Freud
Ernestine Eckstein (1941–1992), American Black, Feminist, and LGBT activist
Ernst Eckstein (1845–1900), German humorist, novelist and poet
Hans Eckstein (1908–1985), German water polo player
Hermann Eckstein (1847–1893), German-born mining magnate and banker in South Africa
John Eckstein (1736–1817), German artist
Otto Eckstein (1927–1984), German-born economist at Harvard University, and member of the U.S. President's Council of Economic Advisers
Rudolf Eckstein (1915–near 1939), German rower
Péter Eckstein-Kovács (born 1956), Romanian politician
Peter A. Eckstein, American president of Institute of Electrical and Electronics Engineers