Jefferson County Research


Records for people who have lived in Jefferson County begin in 1852 and come from a variety of sources. We hope you will find what you’re looking for on our website – or at least a way to uncover the secrets of your ancestors’ pasts.

JCGS would be happy to assist you with your research. Go to the Research Request  page for details.

About Jefferson County. History and information on the county.

Jefferson County Resources. Organizations which might be helpful in researching your family history.

Jefferson County Records. What records were kept and how to find them.

Online Databases. JCGS has indexed and cataloged more than 250,000 records covering many aspects of the lives of Jefferson County residents.

Links to local, regional and statewide sites that are also available to assist you with your research. These include links to local libraries, local city and county governments, regional genealogical societies, and Washington state resources.