Administrative units List of States 35 States & Union territories List of Districts 593 Districts List of Sub-Districts (i.e., Tahsils/Talukas/CD Blocks etc.) 5564 Sub-Districts (Tahsils etc.) Nomenclature of Sub-Districts List of Urban Agglomerations (UAs) 384 UAs List of Towns 5161 Towns List of Million Plus Urban Agglomerations/Cities 35 Million Plus UAs List of Million Plus Cities 27 Million Plus Cities List of Million Plus Cities with Slums City Area District