Knapp is a surname. Notable people with the surname include:
Alexis Knapp, actress
Anthony Knapp, mathematician
Bliss Knapp, early Christian Scientist
Brooke Knapp, American aviator and realtor
Charles Knapp, American classical scholar
Charles Boynton Knapp, President, University of Georgia
Chauncey L. Knapp, Congressman, U.S House of Representatives
Chris Knapp (disambiguation), several people
Edward Knapp (disambiguation), the name of several notable persons
Florence Knapp (disambiguation), several people
Gaines A. Knapp (1848–1918), American politician
Georg Christian Knapp (1753–1825), German Protestant theologian
Georg Friedrich Knapp, German economist
George Knapp (disambiguation), several people
Greg Knapp, American football offensive coordinator
H. Wallace Knapp (1869–1929), New York politician
Harry Shepard Knapp, vice-admiral of the United States Navy
Hermann Jakob Knapp, German-American ophthalmologist
Jennifer Knapp, Christian folk-rock musician
Joe Knapp, American musician
John Holly Knapp (1791–1837), American general and businessman, founder of the city of Fort Madison, Iowa
John Holly Knapp (1825–1888), American businessman, of Knapp, Stout & Co.
John Leonard Knapp, British botanist
Joseph P. Knapp, publisher and conservationist
Justin Knapp, Wikipedia editor
Karin Knapp, Italian tennis player
Lubor Knapp, Czech footballer
Lyman Enos Knapp, American politician
Mark L. Knapp, American academic, author
Martin Knapp, economist and policy analyst
Martin Wells Knapp, American Methodist evangelist who founded the Pilgrim Holiness Church and God's Bible School and College
Phoebe Knapp, American composer of music for hymns
Sandra Knapp (aka Sandy Knapp), British-American botanist
Seaman A. Knapp, the second president of Iowa State University
Sebastian Knapp, actor
Steve Knapp, racing car driver
Steven Knapp, President of The George Washington University
Wesley M. Knapp, American botanist
Whitman Knapp (1909–2004), federal judge, Chairman of the Knapp Commission which probed into corruption in the NYPD
