Gau Southern Hanover-Brunswick

Infobox Former Subdivision
conventional_long_name = "Gau Sudhannover-Braunschweig"
Gau Southern Hanover-Brunswick
common_name = Gau Southern Hanover-Brunswick
subdivision =

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image_map_caption = Map of Nazi Germany showing its administrative subdivisions, the "Gaue" and "Reichsgaue"
national_anthem=
capital = Lüneburg
stat_area1=
stat_year1 =
stat_pop1 =
p1= Free State of Prussia (1933-1935)
flag_p1 = Flag of Prussia 1933.svg
p2= Free State of Brunswick
flag_p2 = Flagge Herzogtum Braunschweig.svg
s1 = Lower Saxony
flag_s1 = Flag of Lower Saxony.svg
s2 = Saxony-Anhalt
flag_s2 = Flag of Saxony-Anhalt (state).svg
event_start = Establishment
year_start = 1933
event_end = Disestablishment
year_end = 1945
event1 =
date_event1 = 30 January 1933
event2 =
date_event2 = 8 May 1945
pol_subdiv =
title_leader = Gauleiter
leader1 = Bernhard Rust
year_leader1 = 1933 - 1940
leader2 = Hartmann Lauterbacher
year_leader2 = 1940 - 1945

Gau Southern Hanover-Brunswick (German:"Gau Sudhannover-Braunschweig") was a regional district established in 1933 in Nazi Germany. Initially the gau was a territorial component of both the Free State of Prussia and the Free State of Brunswick from 1933 to 1935. However after the German constituent states were abolished in 1935, the gaus replaced them in their responsibilities. Gau East Hannover was dismantled after Germany's defeat in 1945. The territory after the war became part of Lower Saxony in West Germany.