The Top 10 Cities With The Most Jews

          City                  Population

1. Tel Aviv           2,560,000 
2. New York        1,970,000 
3. Haifa                   655,000 
4. Los Angeles       621,000 
5. Jerusalem          570,000 
6. Miami                  514,000 
7. Paris                   310,000 
8. Philadelphia      276,000 
9. Chicago             261,000 
10. Boston                227,000 

* City population statistics vary depending on what is included in the metropolitan area of the city, as well as the usual issues of who counts as Jewish. Information from http://www.simpletoremember.com/ vitals/world-jewish-population.htm (retrieved on September 7, 2011).

One of the largest Jewish populations is in New York.  

Check out this book about Jewish New York.