The ‘Second Urbanisation’ is the name given to the vibrant new phase of city life that began in the 1st millennium BCE in the Ganga plains, parts of the Indus (or Sindhu) basin and neighbouring regions, and then spread gradually to other parts of the Subcontinent.
It is called the second one because India had already had a first one:
| First Urbanisation | Second Urbanisation | |
|---|---|---|
| Which civilisation | Indus / Harappan / Sindhu-Sarasvatī | Janapadas and mahājanapadas |
| When | 3rd millennium BCE; disintegrated in the early 2nd millennium BCE | Began in the 1st millennium BCE |
| Where | Indus (Sindhu) and Sarasvatī basins | Ganga plains, parts of the Indus basin, then all over India |
| Chief metal | Copper and bronze | Iron |
In between the two came a gap of a whole millennium in which urban life was absent from India, though there may have been a few towns here and there in north India.