Via API queries I have easily obtained all county populations within a state, and all places populations within a state. Is there a way to obtain population for each place in a particular county? The main problem is that I want to know all of the places that are contained in one particular county. A secondary special case issue is the situation where a place (incorporated or CDP) may cross a county boundary... thus making it difficult to determine what percentage of the places area and population is in each county. Do you think this is possible, and do I need to go down to tract and group levels?