I can find TechNet articles on the software boundaries for SharePoint Online, but there is no mention on the maximum number of lists or libraries. Any insight?
There are no limit mentioned for number of list /library in a site collection but we can do a math and estimate how much we can create a web application.
Supported Limit for number Items in a content Database is 60 Million.
Supported limit for Number of Items in a List / library is 30 Million.
Now if we have a single site collection in a content database then we can 2 have List / Library with 30 Million items in each. Again you can cross that limit per depend upon your infrastructure.
Number of list ? library depend on the following factor
- How many Site collection in a single content database.
- How many items in each list and library.
- Performance of the SharePoint.
another example: a single site collection in a content database, can have 60 list with 1 million items in each.