The major cities located on the river Ganga are:

1. Varanasi city of Uttar Pradesh

2. Haridwar city of Uttarakhand

3. Prayagraj also called as Allahabad

4. Kolkata  

5. Patna city of Bihar

6. Kanpur city of Uttar Pradesh

7. Ghazipur town of Uttar Pradesh

River Ganga originates from Gangotri glacier and flows through the above mentioned cities and falls in Kedranath. From the above mentioned list of cities it can be inferred that there are seven major cities located on the river Ganga.