Hartmut Heinrich (born 5 March 1952 in Northeim, Lower Saxony) is a German marine geologist and climatologist.
Heinrich was Head of the Marine Physics Department at the Federal Maritime and Hydrographic Agency (BSH) in Hamburg until September 2017.
He was actively involved in global Argo Ocean Observing Programme, environmental research and administration, and adaptation to climate change.
In October 2017 the Free and Hanseatic City honoured his important contribution to climatic research with the title "Professor honoris causa".
Heinrich warns of the consequences of global warming that could occur precipitously and of far larger effects on navigation, coastal populations and the marine environment.