World War II further increased government activity, adding to the number of federal employees in the capital; by 1950, the District's population reached its peak of 802,178 residents.
Perang Dunia II turut meningkatkan aktivitas pemerintah dan menambah jumlah karyawan federal di ibu kota; pada 1950, jumlah penduduk Distrik mencapai puncaknya sebanyak 802.178 jiwa.