Lehnert is a German surname. Notable people with the surname include:
Adolf Lehnert (1862–1948), German sculptor and medal designer Andreas Lehnert, German clarinetist Hildegard Lehnert (1857–1943), German painter Jürgen Lehnert (born 1954), East German sprint canoeist Katharina Lehnert (born 1994), Filipino-German tennis player Konrad Lehnert, American experimental physicist Michael R. Lehnert, retired major general of the United States Marine Corps Pascalina Lehnert (1894–1983), German Roman Catholic sister Rajmund Lehnert (born 1965), German cyclist Rudolf Franz Lehnert (1878–1948), Austrian photographer Wendy Lehnert, American computer scientist
See also Lehnert v. Ferris Faculty Association Klaus Lehnertz (1938–2026), German pole vaulter