Brosius is a surname. Notable people with the surname include:
Charlton Brosius, American tug-of-war competitor Eric Brosius, American musician and video game developer Fernand Brosius (1934–2014), Luxembourgish footballer Frauke Brosius-Gersdorf (born 1971), German legal scientist and university professor of public law George Brosius, American gymnast Jürgen Brosius (born 1948), German evolutionary biologist Laura Brosius, German football player Marriott Henry Brosius, member of the U.S. Congress from Pennsylvania Scott Brosius, American baseball player Terri Brosius, American musician and video game developer