东柏林（德语：Ost-Berlin）是对1949－1990年间柏林东部地区的称呼，亦为德意志民主共和国（东德）首都，源于苏军在1945年设立的柏林占领区。

自东西德统一以来，德国政府花费大量人力物力提升东柏林的公共基础设施，以跟上西柏林的发展步伐。

East Berlin existed between 1949 and 1990. It comprised the eastern regions of Berlin and consisted of the Soviet sector of Berlin that was established in 1945. The American, British, and French sectors became West Berlin, a part strongly associated with West Germany. East Berlin was the de facto capital of East Germany. From 13 August 1961 until 9 November ****, East Berlin was separated from West Berlin by the Berlin Wall. The official name that was used by the East German government changed over the course of years from "Greater Berlin" to "Democratic Berlin" to "Berlin, Capital of the GDR" or simply "Berlin." Within official usage, it had become more widespread since the 1970s to refer only to the Western part of the city with a different name ("Westberlin"), whilst calling the Eastern part simply "Berlin". (See also Naming conventions).