Zehnder is a German-language surname. Notable people of this surname include the following:
Beat Zehnder (1966), Swiss Formula One engineer
Bruno Zehnder (1945–1997), Swiss penguin photographer
Cinzia Zehnder (born 1997), Swiss professional association footballer
Eduard Zehnder, (born 1940), Swiss mathematician
Eugen Zehnder (1917–1991), highly decorated German soldier in World War II
Gladys Zender (born 1939), Peruvian model, Miss Universe 1957
Jean-Claude Zehnder (born 1941), Swiss organist and musicologist
Josef Zehnder (born 1944), Swiss ski jumper
Kaspar Zehnder (born 1970), Swiss conductor and flautist
Ludwig Zehnder (1854–1949), Swiss physicist
Manuela Zehnder (born 1983), Swiss squash player
Sepp Zehnder (born 1974), Swiss ski jumper
Silas Zehnder (born 1999), German professional association footballer
Lucia Näfen-Zehnder (born 1962), Swiss ski mountaineer, long-distance runner and politician