Mark said:Donna Reed was set in Hilldale, and it seemed to be a smallish town but big enough for one hospital.
As was the old Jay North sitcom Dennis The Menace since there was at least one or perhaps two episodes where Mr.Wilson ( Joe Kearns ) and Dennis had themselves apearing on Reed's show. Now as far as location went, there were two episodes of Dennis The Meance well....
One episode had Dennis stopping by a local TV station whose calls had start with a "W" while another one had snow falling in Hilldale. That kinda rules out California..well at least with the station with a "W" anyway.