Fresenius is a German surname. Notable people with the surname include:
Carl Remigius Fresenius (1818–1897), German chemist Christian Fresenius (1749-1811), German Jurist and writer Eduard Fresenius ( (1874–1946), German businessman, founder of Fresenius Georg Fresenius (1808–1866), German botanist Wilhelm Fresenius (1913–2004), German chemist from Mainz
See also Fresenius SE, a German health care company, or subsidiaries