Kopp is a surname. Notable people with the surname include:
Carlo Kopp, Australian defence analyst
Elisabeth Kopp (born 1936), Swiss politician
Emil Kopp (1817–1875), French chemist
Georg von Kopp (1837–1914), German cardinal
Georges Kopp (1902–1951), Belgian commander of Republican forces in the Spanish Civil War
Hal Kopp (1909–1998), American college football coach
Hermann Kopp (born 1954), German composer and musician
Hermann Franz Moritz Kopp (1817–1892), German chemist
James Charles Kopp (born 1954), American murderer
Joseph Eutych Kopp (1793–1866), Swiss antiquarian (see Kopp, Joseph Eutychius, Encyclopedia Americana (1920)
Magdalena Kopp (1948–2015), member of the Frankfurt Revolutionary Cells (RZ), wife and accomplice of Carlos the Jackal
Nancy K. Kopp (born 1943), American politician
Pavol Kopp, Slovak sport shooter
Quentin L. Kopp (born 1928), American politician
Sheldon Kopp (1929–1999), American psychotherapist
Stephen J. Kopp (1951–2014), American university president
Wendy Kopp (born 1967), president and founder of Teach For America