Reppenstedt is a municipality and the administrative centre of the Samtgemeinde Gellersen within the district of Lüneburg in Lower Saxony, Germany.
August Heißmeyer (or Heissmeyer – 11 January 1897 in Gellersen, nowadays part of Aerzen – 16 January 1979 in Schwäbisch Hall), was a leading member of the SS.