County records can be a great source of information for births, deaths and marriages.
Sometimes, however, you may know the death date of a family member and what county they died in, but you can't find the birth records. The reason may be that the county had a different name and county seat when they were born. The County Reference Guide will let you trace those changes through time to help track down records on those elusive ancestors. It contains records on each of the over 3500 counties recorded in US history. Links between counties let you follow county reorganizations as they split and merged.