Notable people with this surname include:

• Anton Janson (1620–1687), Dutch printer and typographer after whom the font "Janson" is named
• Charles Auguste Marie Joseph, Comte de Forbin-Janson (1785–1844), French Bishop of Nancy and Toul, and founder of the Association of the Holy Childhood
• Chris Janson (born 1986), American country music singer and songwriter
• Ciara Janson (born 1987), English actress
• David Janson (born 1950), English actor and father of Ciara Janson
• Ernest A. Janson (1878–1930), highly decorated United States Marine of World War I
• H. W. Janson (1913–1982), American art historian
• Horst Janson (actor), German film and television actor
• Jonathan Janson (born 1950), American painter and art historian
• Klaus Janson (born 1952), American comic book artist
• Lucas Janson (born 1994), Argentine footballer
• Marie Janson (1873–1960), Belgian politician and first woman to serve in the Belgian Senate; sister of Paul-Émile Janson
• Oscar Janson (born 1975), Swedish athlete
• Paul Janson (1840–1913), Belgian liberal politician; father of Paul-Émile Janson and Marie Janson
• Paul-Émile Janson (1872–1944), Belgian liberal politician, brother of Marie Janson
• Svante Janson, Swedish mathematician

Fictional edit

• Paul Janson, the protagonist of The Janson Directive, a novel by Robert Ludlum
• Wes Janson, an X-Wing pilot in Rogue Squadron in the Star Wars movies and expanded universe novels

While Janson is uncommon as a given name, notable people with this first name include:

• Janson Junk (born 1996), American baseball player
• Janson van Keulen (1593–1661), variant name of Cornelius Johnson, English portrait painter

• Jansons (surname)
• Jansson
• Jenson (name)
• All pages with titles beginning with Janson
• All pages with titles containing Janson