Knoll is a surname. Notable people with the surname include:

• Albert Knoll (1796–1863), Austrian theologian
• Andrew H. Knoll (born 1951), Harvard University professor and paleontologist
• Catherine Baker Knoll (1930–2008), American politician and 30th Lieutenant Governor of Pennsylvania
• Corina Knoll, American journalist
• Christoph Knoll (1563–1630), German theologian and hymn writer
• Erwin Knoll (1931–1994), American journalist
• Florence Knoll (1917–2019), American architect and furniture designer
• Franklin J. Knoll (born 1940), American politician, lawyer, and judge
• Hans Knoll (1914–1955), German-American co-founder of the Knoll company; husband of Florence Knoll
• Hans Knöll (1913–1978), German physician and microbiologist
• Jessica Knoll, American author of Luckiest Girl Alive
• Johanna Knoll, German rower
• Jeannette Knoll (born 1943), member of the Louisiana Supreme Court since 1997
• John Knoll (born 1962), co-writer of the program Adobe Photoshop and visual effects supervisor at Industrial Light & Magic
• József Knoll, drug researcher who developed selegiline
• Konrad Knoll (1829–1899), German sculptor
• Marvin Knoll (born 1990), German footballer
• Max Knoll (1897–1969), German electrical engineer, inventor and professor
• Michael Knoll, law professor
• Mike Knoll (born 1951), American collegiate football coach
• Mireille Knoll (1932–2018), French Jewish woman and murder victim
• Samuel Benjamin Cnoll (1705–1767), German physician
• Silke-Beate Knoll (born 1967), German sprinter
• Stephan Knoll, South Australian politician
• Tim Knoll, American freestyle BMX rider
• Thomas Knoll (born 1960), co-writer of Adobe Photoshop and brother of John Knoll
• Will Knoll, co-founder of Parker Knoll, a British furniture manufacturing company
• Xenia Knoll (born 1992), Swiss tennis player

Middle names

• James Knoll Gardner (1940-2017), American judge

See also

• Noll, surname
• Noel (surname)
• Nowell (surname)
• Knowle (disambiguation), includes list of people with surname Knowle