Ok, it's twenty years old and things have probably changed but this RED BOOK should give you some idea of what's available and you can always run searches for new addresses and contact information.
Internet Archive : RED BOOK (2004) Red book : American state, county & town sources
Excerpt: provides updated county and town listings within the same overall state-by-state organization ... information on records and holdings for every county in the United States, as well as excellent maps from renowned mapmaker William Dollarhide ... The availability of census records such as federal, state, and territorial census reports is covered in detail ... Vital records are also discussed, including when and where they were kept and how"--from publisher description
