Hansemann is a surname. Notable people with the surname include:
Adolph von Hansemann (1826–1903), German businessman and banker David Hansemann (1790–1864), Prussian politician and banker David Paul von Hansemann (1858–1920), German pathologist Ferdinand von Hansemann (1861–1900), Prussian landlord and politician Johann Wilhelm Adolf Hansemann (1784–1862), German entomologist and insect dealer Ottilie von Hansemann (1840–1919), German women's rights activist
See also Hansemann Mountains, a mountain range in Papua New Guinea Hasemann's Daughters (film), a 1920 German silent film