Dr. Klaus Peter Richard Otto Zumwinkel (German pronunciation: , born December 15, 1943) was Chief Executive Officer and Chairman of Deutsche Post between 1990 and 2008. Being under suspicion of tax fraud, he resigned from office on February 15, 2008.

Zumwinkel began his career as a consultant with McKinsey in 1974, leaving to become CEO of Quelle AG in 1984 before subsequently joining the management board of Deutsche Post in 1990.