Hagner is a surname. Notable people with the surname include:
Alexander Burton Hagner (1826–1915), United States federal judge Belle Hagner (1875–1943), first United States social secretary Donald Hagner (born 1936), American theologian Matthias Hagner (born 1974), German footballer Meredith Hagner (born 1987), American actress Peter Hagner (1772–1850), American clerk Peter V. Hagner (1815–1893), United States Army officer Viviane Hagner, German violinist
See also
Adele Hagner Stamp (1893–1974), first dean of women at the University of Maryland College Park