This is a list of territorial changes to the district of Helmstedt, Lower Saxony, Germany during the administrative reforms of the 1970s.
Municipalities lost: to Gifhorn Ahnebeck Bergfeld Brechtorf Eischott Hoitlingen Parsau Rühen Tiddische to Wolfsburg Brackstedt Kastorf Neuhaus Nordsteimke Reislingen Velstove Vorsfelde Warmenau Wendschott Municipalities gained: from Gifhorn Ahmstorf Beienrode Essenrode Klein Steimke Ochsendorf Rennau Rottorf am Klei Uhry from Brunswick Beienrode Essehof Flechtorf Groß Brunsrode Klein Brunsrode Lehre Wendhausen