The Halberstadt G.I was a German prototype heavy bomber built by Halberstädter Flugzeugwerke during World War I.
It was a two-seat biplane equipped with two Mercedes D.III engines. The aircraft's armament consisted of one or two Parabellum MG14 machine guns mounted in the rear cockpit on a flexible mount. Maximum bomb load was .
The Halberstadt G.I first flew in spring 1916, but test results showed no real improvement over existed G-series aircraft, and the Luftstreitkrafte rejected the design for consideration into production.