This map shows the Armenian population density in Istanbul. Nobody knows the exact number of Armenians in Istanbul, because all the Armenians are not registered to the Patriarchate. Estimated number is 50.000. Most of the community lives in Kurtulush, Sishli, Samatya, Kumkapu, Kadikoy and Uskudar. Also most Armenians have a summer residence in Kinali Island. This Island is populated %90 by Armenians.
Here is a list of districts in Istanbul that are populated by Armenians. In near future, I'll add the pictures of these areas.
