West Berlin West-Berlin or Berlin (West)
Allied-occupied sector of Berlin
← 1949–1990 →
Flag
The four occupation zones of Berlin. West Berlin is in light blue, dark blue and purple
Historical era		Cold War
-	Established	1949
-	Reunification	3 October 1990

West Berlin, as of 1978.

West Berlin was the name of the western part of Berlin between 1949 and 1990. It was the American, British, and French occupied sectors that were created in 1945.

In many ways it was integrated (joined) with West Germany, but it was not a part of West Germany or East Germany. The Soviet sector became East Berlin, which East Germany claimed as its capital. The Western Allies never recognized this claim. They said that the whole city was still under four-power occupation. The building of the Berlin Wall in 1961 surrounded West Berlin.