I need to download shapefiles for all country from which I need to generate TopoJSON for around all countries.

Currently I am using data from naturalearthdata.org which only provides Admin levels 0 and 1 for all countries. I need for Admin levels 2 and 3 which covers towns/cities/districts details.

I have tried diva-gis.org I had to download country by country from drop down which is taking lot of time.

Is there any site I can download shapefile for admin 2,3 for all countries as single shapefile or country specific shapefiles. (free/open source)


I will integrate this map/ TopoJSON inside d3.js /Java /j2ee project.