Just give your local Realtor a call. We are sort of like investigators - we know how to track down owners of properties! Court House, Tax assessment office, neighbors, internet, Cole Directory.... hire a Buyers Agent, they will work in your best interest.
This is not a difficult process to find the names of the owners, the difficult part is finding out how to get in touch with them. I have resources to identify who's on title, somtimes you will find a different mailing address so you can mail a letter inquiring about the status. Sometimes you are able to simply do a google search to find what the status is with the property. Depending on what you are looking to do with the information I would be open to helping you out.
If you think you can do this by yourself; you can go down to the County Recorder's Office and give them the addresses.
I would bet that in most cases, the property is some stage of Foreclosure, the owner of record will be the Homeowner, who cannot be found, or the Bank, who will not respond to you.