The Ohio-class subs were. The Los Angeles-class were named after cities.
The Ohio predecessors were the Benjamin Franklin-class and Lafayette-class. The Los Angeles-class predecessors were traditionally named after marine animals.
It does look like the Columbia-class will go back to state names - the Wisconsin is next in line.
> It does look like the Columbia-class will go back to state names - the Wisconsin is next in line.
Given today’s military, the following after that will be the USS Puerto Rico.